Table of Contents

Locator Record

Title: Audiometry (AUX_B )
Contact Number: 1-866-441-NCHS
Years of Content: 2001 - 2002
First Published: June, 2005
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:Audiometry
Record Source: NHANES 2001 - 2002
Survey Methodology: NHANES 2001 - 2002 is a stratified multistage probability sample of the civilian non-institutionalized population of the U.S.
Medium: NHANES Web site; SAS transport files

Component Description

The NHANES 2001–2002 Audiometry Examination Component consists of four parts:

1) A pre-exam audiometric questionnaire: This is a series of questions to identify conditions that would affect how audiometric testing is conducted, or how results are interpreted. Questions include whether the subject has ear tubes, a current cold or ear problem, or recent loud noise exposure. Note that more extensive data relating to study subject’s hearing status are contained in the audiometry questionnaire (AUQ) section of the NHANES Sample Person Interview Questionnaire. Questionnaire information regarding occupational noise exposure can be found in the Occupational (OCQ) section of the NHANES Sample Person Interview Questionnaire.

2) A brief otoscopic screening (physical) exam of the ear canals and eardrums: This was performed to identify abnormalities which would require alternate audiometric procedures or influence interpretation of test results, and to identify conditions which might require medical referral. The exam screened for excessive or impacted ear cerumen (wax), physical abnormalities, or collapsing external ear canals.

3) Tympanometry: This is an objective assessment of middle ear function by testing the mobility of the eardrum in response to changes in air pressure within the ear canal. It was used to identify middle ear pathologies that might contribute to hearing loss. Tympanometric data, included in this primary Audiometry data file consists of quantitative measurement data for middle ear volume, pressure, compliance, and gradient.

4) Pure tone air conduction audiometry: This measures hearing sensitivity by presenting pure tone signals to the ear through earphones and by varying the intensity of the signals until a subject’s hearing threshold at that frequency is determined. Testing was performed at frequencies across the range of human hearing.

Eligible Sample

The Audiometry Component tested a ½ sample of U.S. adults ages 20–69 years. Subjects using hearing aids who were not able to remove them for testing and subjects who had sufficient ear pain at the time of the exam that they could not tolerate headphones were excluded from the Audiometry Component. There were no other precluding conditions for any part of the audiologic exam.

Protocol and Procedure

All Audiometry Component sections were performed by a trained examiner on examinees aged 20–69 in a dedicated, sound-isolating room in the mobile examination center (MEC). Hearing threshold testing was conducted on both ears of examinees at seven frequencies (500, 1000, 2000, 3000, 4000, 6000, and 8000 Hz). Testing was conducted according to a modified Hughson Westlake procedure using the automated testing mode of the audiometer, except as indicated below. The effective range for automated audiometric testing was from –10 to 100 decibels (dB) at 500 to 6000 Hz and –10 to 90 dB at 8000 Hz. Thresholds could be tested through 120 dB (110 dB at 8000 Hz) using manual audiometric mode. Observed values, therefore, varied between –10 and 120 dB. If an examinee did not respond to the signal tone at any level for one or more frequencies because of deafness or severe hearing loss, a threshold level of 666 was entered. Manual testing was also conducted when the examinee could not operate the response switch or responded too slowly for the audiometer to accurately record the response.

In some instances, if a pure tone audiometric signal is sufficiently loud, it can “cross over” and be heard by the opposite ear via bone conduction. When this occurs, it is difficult to determine if the threshold obtained is truly the threshold of the test ear, or an artifact of the non-test ear (which may have better hearing). For the current study, a crossover retesting protocol was performed whenever the observed threshold at any given frequency was poorer in one ear than the other by 25 dB at 500 and 1000 Hz; or 40 dB at any higher frequency. Retesting was accomplished using insert earphones, which are smaller and have less direct contact with the head. Thus, a much louder stimulus is required before crossover occurs. Due to the complexity of the procedure, masking was not employed in this survey.

Quality Assurance & Quality Control

Instrumentation for the Audiometry Component included an Interacoustics Model AD226 audiometer with standard TDH-39 headphones and Etymotic EarTone 3A insert earphones. Tympanometry was performed using a Micro Audiometrics Earscan Acoustic Impedance Tympanometer. All testing was performed within a sound-isolating booth, located in a dedicated room in the MEC. Audiometric calibration and background noise levels were checked using a Quest Model 1800 Precision Integrating Sound Level Meter and Model OB-300 1/3-1/1 octave filter set. Daily monitoring of calibration and ambient noise levels was accomplished with a Quest Model BA-201-25 Bioacoustic Simulator and Octave Band Monitor. All data from each of the four sections of the Audiometry Component were entered directly into the computerized NHANES survey database system. Data from the Interacoustics Model AD226 audiometer and Micro Audiometrics Earscan Acoustic Impedance tympanometer were captured electronically and uploaded into the survey information system automatically.

The audiometers used in this survey met the specifications of ANSI S3.6-1996 for Type 3 audiometers. An acoustic calibration check to measure the output and linearity of the audiometer (through both standard and insert earphones) was conducted before the examinations began at each MEC site using a Quest Model 1800 sound level meter kit; a complete acoustic calibration check was also conducted at the end of each stand. Throughout the stand, output of the audiometer was monitored daily using a Quest Model BA-201-25 bioacoustic simulator, and a daily listening check (tone quality, attenuator accuracy, headphone cords, crossover, etc.) was also performed. Standard and insert earphones were checked on an alternating basis. If a unit did not meet specifications, it was sent for servicing, and a fully calibrated backup unit was used for examinations. Manufacturer’s calibration (traceable to the National Institute of Standards and Technology [NIST]) was performed annually on each audiometer.

An environmental noise survey was also conducted at the beginning of each stand using the Quest 1800 sound level meter. The survey was repeated weekly throughout the stand. The audiometric test room was required to meet or exceed the specifications of ANSI S3.1-1991 for ears covered testing. A Quest Model BA-201-25 Bioacoustic Simulator and Octave Band Monitor was used to continuously measure the background noise levels in the audiometric test room during audiometric examinations. Pure tone audiometric testing was not performed if ambient noise levels in the test booth exceeded maximum permissible levels. A comprehensive calibration (traceable to NIST) of the sound level meter and bioacoustic simulator were performed annually by the manufacturer. The physical volume calibration of the Micro Audiometric Earscan tympanometer was checked at the start and end of each stand and daily throughout the stand. Air pressure was calibrated automatically by the unit each time it was turned on. The tympanometer also received an exhaustive NIST-traceable calibration check annually.

As an additional quality measure, all audiograms, whether conducted in automated or manual mode, tested the 1000 Hz frequency twice in each ear as a measure of the reliability of the subject’s responses. Pure tone audiograms were not accepted if there was more than a 10 dB difference between them. For further details regarding any of these procedures, analysts should consult the NHANES Audiometry/Tympanometry Procedures Manual. (National Center for Health Statistics, 2001)

The MEC Health Technicians who performed the Audiometry Examination Component of NHANES were professionally trained by a certified audiologist from the National Institute for Occupational Safety & Health (NIOSH). NIOSH also conducted health technician performance monitoring of each technician on a regular basis. Field visits to each MEC were conducted by the NIOSH Audiologist at least three times per year. Additionally, NCHS Project Officers visited the MECs approximately twice per year to observe the audiometry examinations and verify that standard testing procedures were being followed. NIOSH consultants provided the MEC health technicians with annual retraining and protocol updates.

The quantitative tympanometric measurements reported in this data file represent the single best of two curves obtained during testing. Subjective quality ratings for these tympanograms are the variables AUAREQC and AUALEQC. These represent a qualitative assessment of tympanogram quality by the consulting Audiologist. Please note, however, that this rating process scored tympanograms on the basis of quality, not normality. Abnormal tympanograms were classified as “good” if they were consistent with a subject’s audiometric data, including otoscopy, numeric tympanometry readings, and audiogram.

Data Processing and Editing

All data were captured into the NHANES computerized database system, with audiometric and tympanometric data automatically uploaded. On a continuous basis, a consulting Audiologist performed a clinical review of all data for each subject as it was received, checking for quality and consistency. In addition, a computerized data editing program was developed to check for logical inconsistencies in the data and technician errors, and to cross-check other issues affecting data quality (consistency in identifying potential instances where crossover effects might have occurred, assurance of randomization of the initial test ear, etc.). Back-end edits of the data were performed as needed when errors were detected.

Analytic Notes

This examination was administered to a ½ sample of participants in the MEC. Therefore, the Audiometry sub-sample weights provided with the Audiometry data file should be used for data analysis. For more information on the use of sample weights in current NHANES data analysis, refer to the current NHANES Analytic and Reporting Guidelines. Please note that for Audiometric data analysis combining NHANES 1999–2000 and NHANES 2001–2002 data, the special 4-year examination weights should be employed (WTSAU4YR).

Audiologic data analysis is a complex procedure and requires a thorough knowledge of the specialty content area for valid results to be obtained. If an analyst does not have professional experience in this area, it is recommended that audiologic consultation be obtained to help formulate and review the results of the analysis. Data analysts should be especially aware of the fact that the number “666” in all primary audiometric frequency data fields (AUXU1K1R through AUXU8KL) as well as in all repeat test frequencies (AUXR1K1R through AUXR8KL) is a qualitative code for non-response at a particular frequency, and does not represent actual measured decibel hearing threshold values. They should be appropriately edited prior to any numerical data analysis.

References

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 20 YEARS - 69 YEARS

WTSAU2YR - Audiometry Subsample 2 Year Mec Weight

Variable Name:
WTSAU2YR
SAS Label:
Audiometry Subsample 2 Year Mec Weight
English Text:
Audiometry Subsample 2 Year Mec Weight
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3358.532488693230 to 411457.268689780000 Range of Values 1914 1914
. Missing 132 2046

WTSAU4YR - Audiometry Subsample 4 Year Mec Weight

Variable Name:
WTSAU4YR
SAS Label:
Audiometry Subsample 4 Year Mec Weight
English Text:
Audiometry Subsample 4 Year Mec Weight
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1717.538914 to 212637.94244 Range of Values 1914 1914
. Missing 132 2046

AUAEXSTS - Status of an Audio Exam

Variable Name:
AUAEXSTS
SAS Label:
Status of an Audio Exam
English Text:
Status of an Audiometry Exam
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Complete 1818 1818
2 Partial 96 1914
3 Not done 132 2046
. Missing 0 2046

AUAEXCMT - Comment code for an Audio Exam

Variable Name:
AUAEXCMT
SAS Label:
Comment code for an Audio Exam
English Text:
Comment code for an Audio Exam
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 SP refusal 20 20
3 No time 5 25
4 Physical limitation 25 50
5 Communication problem 12 62
6 Equipment failure 8 70
7 Sp ill/emergency 3 73
56 Came late/left early 65 138
66 Data acquisition problems 4 142
72 Error (technician/software/supply) 4 146
99 Other, specify 82 228
. Missing 1818 2046

AUQ010 - Have Ear Tube, Right or Left Ear?

Variable Name:
AUQ010
SAS Label:
Have Ear Tube, Right or Left Ear?
English Text:
Do you now have a tube in your right or left ear? (If yes, indicate affected ear(s))
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes, right ear 3 3
2 Yes, left ear 1 4
3 Yes, both ears 5 9
4 No 1901 1910
7 Refused 1 1911
9 Don't know 3 1914
. Missing 132 2046

AUQ020 - Had Cold, Sinus or Earache Last 24 Hrs?

Variable Name:
AUQ020
SAS Label:
Had Cold, Sinus or Earache Last 24 Hrs?
English Text:
Have you had a cold, sinus problem, or earache in the last 24 hours?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 301 301
2 No 1611 1912
7 Refused 0 1912
9 Don't know 2 1914
. Missing 132 2046

AUQ020A - Had Cold Last 24 Hrs?

Variable Name:
AUQ020A
SAS Label:
Had Cold Last 24 Hrs?
English Text:
Have you had a cold in the last 24 hours?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 118 118
2 No (checkbox unchecked) 183 301
. Missing 1745 2046

AUQ020B - Had Sinus Problem Last 24 Hours?

Variable Name:
AUQ020B
SAS Label:
Had Sinus Problem Last 24 Hours?
English Text:
Have you had a sinus problem in the last 24 hours
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 195 195
2 No (checkbox unchecked) 106 301
. Missing 1745 2046

AUQ020C - Earache Last 24 Hours, Right?

Variable Name:
AUQ020C
SAS Label:
Earache Last 24 Hours, Right?
English Text:
Have you had an earache in the right ear in the last 24 hours?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 11 11
2 No (checkbox unchecked) 290 301
. Missing 1745 2046

AUQ020D - Earache Last 24 Hours, Left?

Variable Name:
AUQ020D
SAS Label:
Earache Last 24 Hours, Left?
English Text:
Have you had an earache in left ear in the last 24 hours?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 16 16
2 No (checkbox unchecked) 285 301
. Missing 1745 2046

AUQ020E - Earache Last 24 Hours, Both?

Variable Name:
AUQ020E
SAS Label:
Earache Last 24 Hours, Both?
English Text:
Have you had an earache in both ears in the last 24 hours?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 8 8
2 No (checkbox unchecked) 293 301
. Missing 1745 2046

AUQ030 - Exposed Loud Noise/Music Last 24 Hrs?

Variable Name:
AUQ030
SAS Label:
Exposed Loud Noise/Music Last 24 Hrs?
English Text:
Have you been exposed to loud noise or listened to music with headphones in the past 24 hours?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 155 155
2 No 1759 1914
7 Refused 0 1914
9 Don't know 0 1914
. Missing 132 2046

AUQ040 - Hours Since Noise/Music Ended?

Variable Name:
AUQ040
SAS Label:
Hours Since Noise/Music Ended?
English Text:
How many hours ago did the noise or music end?
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
1 to 24
Code or Value Value Description Count Cumulative Skip to Item
1 to 24 Range of Values 155 155
77 SP refused 0 155
99 Don't know 0 155
. Missing 1891 2046

AUQ050 - Self Reported Better Ear

Variable Name:
AUQ050
SAS Label:
Self Reported Better Ear
English Text:
Do you hear better in one ear than the other?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes, right ear 199 199
2 Yes, left ear 146 345
7 Refused 0 345
9 No / don't know 1569 1914
. Missing 132 2046

AUXOTSPL - Normal Otoscopy, Left Ear?

Variable Name:
AUXOTSPL
SAS Label:
Normal Otoscopy, Left Ear?
English Text:
Normal: Left Ear Otoscopy
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 1664 1664
2 No (checkbox unchecked) 250 1914
. Missing 132 2046

AUXLOEXC - Excessive Cerumen, Left Ear

Variable Name:
AUXLOEXC
SAS Label:
Excessive Cerumen, Left Ear
English Text:
Excessive Cerumen, Left Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 157 157
2 No (checkbox unchecked) 1757 1914
. Missing 132 2046

AUXLOIMC - Impacted Cerumen, Left Ear

Variable Name:
AUXLOIMC
SAS Label:
Impacted Cerumen, Left Ear
English Text:
Impacted Cerumen, Left Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 81 81
2 No (checkbox unchecked) 1833 1914
. Missing 132 2046

AUXLOCOL - Collapsing Ear Canals, Left Ear

Variable Name:
AUXLOCOL
SAS Label:
Collapsing Ear Canals, Left Ear
English Text:
Collapsing Ear Canal, Left Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 20 20
2 No (checkbox unchecked) 1894 1914
. Missing 132 2046

AUXLOABN - Other Exam Abnormality, Left Ear?

Variable Name:
AUXLOABN
SAS Label:
Other Exam Abnormality, Left Ear?
English Text:
Other Exam Abnormality, Left Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 12 12
2 No (checkbox unchecked) 1902 1914
. Missing 132 2046

AUDLOABC - Comment:Other Ear Exam Abnormality, Left

Variable Name:
AUDLOABC
SAS Label:
Comment:Other Ear Exam Abnormality, Left
English Text:
Other Exam Abnormality, Left, Comment
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Possible Perforated Eardrum 5 5
2 Perforated Eardrum 2 7
3 Possible Infection 3 10
4 TM Scarring/Deformity 1 11
. Missing 2035 2046

AUXROTSP - Normal Otoscopy, Right Ear?

Variable Name:
AUXROTSP
SAS Label:
Normal Otoscopy, Right Ear?
English Text:
Normal: Right Ear Otoscopy
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 1649 1649
2 No (checkbox unchecked) 265 1914
. Missing 132 2046

AUXROEXC - Excessive Cerumen, Right Ear

Variable Name:
AUXROEXC
SAS Label:
Excessive Cerumen, Right Ear
English Text:
Excessive Cerumen, Right Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 155 155
2 No (checkbox unchecked) 1759 1914
. Missing 132 2046

AUXROIMC - Impacted Cerumen, Right Ear

Variable Name:
AUXROIMC
SAS Label:
Impacted Cerumen, Right Ear
English Text:
Impacted Cerumen, Right Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 97 97
2 No (checkbox unchecked) 1817 1914
. Missing 132 2046

AUXROCOL - Collapsing Ear Canals, Right Ear

Variable Name:
AUXROCOL
SAS Label:
Collapsing Ear Canals, Right Ear
English Text:
Collapsing Ear Canal, Right Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 19 19
2 No (checkbox unchecked) 1895 1914
. Missing 132 2046

AUXROABN - Other Exam Abnormality, Right Ear?

Variable Name:
AUXROABN
SAS Label:
Other Exam Abnormality, Right Ear?
English Text:
Other Exam Abnormality, Right Ear
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes (checkbox checked) 14 14
2 No (checkbox unchecked) 1900 1914
. Missing 132 2046

AUDROABC - Comment Other Ear Exam Abnormality Right

Variable Name:
AUDROABC
SAS Label:
Comment Other Ear Exam Abnormality Right
English Text:
Other Exam Abnormality, Right, Comment
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Possible Perforated Eardrum 3 3
2 Perforated Eardrum 5 8
3 Possible Infection 4 12
4 TM Scarring/Deformity 0 12
. Missing 2034 2046

AUXTMEPR - Middle Ear Pressure-Tymp, Rt Ear in daPa

Variable Name:
AUXTMEPR
SAS Label:
Middle Ear Pressure-Tymp, Rt Ear in daPa
English Text:
Middle ear pressure (tympanometry), right ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
-400.0000 to 200.0000
Code or Value Value Description Count Cumulative Skip to Item
-282 to 180 Range of Values 1789 1789
555 Compliance <= 0.2 100 1889
777 Refused 5 1894
888 Could not obtain 0 1894
. Missing 152 2046

AUXTPVR - Physical Volume-Tymp, Right Ear in cc

Variable Name:
AUXTPVR
SAS Label:
Physical Volume-Tymp, Right Ear in cc
English Text:
Physical volume (tympanometry), right ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
0.0 to 7.0
Code or Value Value Description Count Cumulative Skip to Item
0.3 to 4.4 Range of Values 1888 1888
777 Refused 5 1893
888 Could not obtain 0 1893
. Missing 153 2046

AUXTWIDR - Tympanometric width, right ear

Variable Name:
AUXTWIDR
SAS Label:
Tympanometric width, right ear
English Text:
Tympanometric width, right ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
0.0000 to 500.0000
Code or Value Value Description Count Cumulative Skip to Item
0 to 276 Range of Values 1789 1789
555 Compliance <= 0.2 100 1889
777 Refused 5 1894
888 Could not obtain 0 1894
. Missing 152 2046

AUXTCOMR - Compliance (tympanometry), right ear

Variable Name:
AUXTCOMR
SAS Label:
Compliance (tympanometry), right ear
English Text:
Compliance (tympanometry), right ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
0.0000 to 8.0000
Code or Value Value Description Count Cumulative Skip to Item
0 to 4.2 Range of Values 1889 1889
777 Refused 5 1894
888 Could not obtain 0 1894
. Missing 152 2046

AUXTMEPL - Middle Ear Pressure, Tymp, Left in dapa

Variable Name:
AUXTMEPL
SAS Label:
Middle Ear Pressure, Tymp, Left in dapa
English Text:
Middle ear pressure (tympanometry), left ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
-400.0000 to 200.0000
Code or Value Value Description Count Cumulative Skip to Item
-294 to 144 Range of Values 1795 1795
555 Compliance <= 0.2 96 1891
777 Refused 6 1897
888 Could not obtain 0 1897
. Missing 149 2046

AUXTPVL - Physical Volume-Tymp, Left ear in cc

Variable Name:
AUXTPVL
SAS Label:
Physical Volume-Tymp, Left ear in cc
English Text:
Physical volume (tympanometry), left ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
0.0 to 7.0
Code or Value Value Description Count Cumulative Skip to Item
0.3 to 5.7 Range of Values 1881 1881
777 Refused 6 1887
888 Could not obtain 0 1887
. Missing 159 2046

AUXTWIDL - Tympanometric width, left ear

Variable Name:
AUXTWIDL
SAS Label:
Tympanometric width, left ear
English Text:
Tympanometric width, left ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
0.0000 to 500.0000
Code or Value Value Description Count Cumulative Skip to Item
0 to 318 Range of Values 1795 1795
555 Compliance <= 0.2 96 1891
777 Refused 6 1897
888 Could not obtain 0 1897
. Missing 149 2046

AUXTCOML - Compliance (tympanometry), left ear

Variable Name:
AUXTCOML
SAS Label:
Compliance (tympanometry), left ear
English Text:
Compliance (tympanometry), left ear
Target:
Both males and females 20 YEARS - 69 YEARS
Hard Edits:
0.0000 to 8.0000
Code or Value Value Description Count Cumulative Skip to Item
0 to 4.8 Range of Values 1891 1891
777 Refused 6 1897
888 Could not obtain 0 1897
. Missing 149 2046

AUAEAR - Which ear tested first?

Variable Name:
AUAEAR
SAS Label:
Which ear tested first?
English Text:
Which ear tested first?
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Right 1033 1033
2 Left 873 1906
. Missing 140 2046

AUAMODE - Audio Test Mode-Manual/Automatic/Mixed

Variable Name:
AUAMODE
SAS Label:
Audio Test Mode-Manual/Automatic/Mixed
English Text:
Mode of Audiometric Test (Manual/Automatic/Mixed)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Manual 10 10
2 Automatic 1843 1853
3 Mixed 50 1903
. Missing 143 2046

AUAFMANL - Frequency, Switch to Manual Mode, Left

Variable Name:
AUAFMANL
SAS Label:
Frequency, Switch to Manual Mode, Left
English Text:
Frequency at Which Switched From Auto to Manual Audio Testing (Left)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 None 1883 1883
2 500 Hz 1 1884
3 1000 Hz 1 1885
4 2000 Hz 2 1887
5 3000 Hz 0 1887
6 4000 Hz 2 1889
7 6000 Hz 3 1892
8 8000 Hz 14 1906
. Missing 140 2046

AUAFMANR - Frequency-Switch to Manual Mode, Right

Variable Name:
AUAFMANR
SAS Label:
Frequency-Switch to Manual Mode, Right
English Text:
Frequency at Which Switched From Auto to Manual Audio Testing (Right)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 None 1882 1882
2 500 Hz 1 1883
3 1000 Hz 0 1883
4 2000 Hz 1 1884
5 3000 Hz 2 1886
6 4000 Hz 2 1888
7 6000 Hz 6 1894
8 8000 Hz 12 1906
. Missing 140 2046

AUXU1K1R - Right threshold @ 1000Hz (db)

Variable Name:
AUXU1K1R
SAS Label:
Right threshold @ 1000Hz (db)
English Text:
Right threshold @ 1000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 95 Range of Values 1876 1876
666 No response 0 1876
888 Could not obtain 0 1876
. Missing 170 2046

AUXU500R - Right threshold @ 500Hz (db)

Variable Name:
AUXU500R
SAS Label:
Right threshold @ 500Hz (db)
English Text:
Right threshold @ 500Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 105 Range of Values 1878 1878
666 No response 0 1878
888 Could not obtain 0 1878
. Missing 168 2046

AUXU1K2R - Right Threshold @ 1000Hz-2nd Read (db)

Variable Name:
AUXU1K2R
SAS Label:
Right Threshold @ 1000Hz-2nd Read (db)
English Text:
Right threshold @ 1000Hz (second reading)in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 100 Range of Values 1879 1879
666 No response 0 1879
888 Could not obtain 0 1879
. Missing 167 2046

AUXU2KR - Right threshold @ 2000Hz (db)

Variable Name:
AUXU2KR
SAS Label:
Right threshold @ 2000Hz (db)
English Text:
Right threshold @ 2000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 110 Range of Values 1880 1880
666 No response 1 1881
888 Could not obtain 0 1881
. Missing 165 2046

AUXU3KR - Right threshold @ 3000Hz (db)

Variable Name:
AUXU3KR
SAS Label:
Right threshold @ 3000Hz (db)
English Text:
Right threshold @ 3000Hz in decibels (Hearing Levels)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 110 Range of Values 1880 1880
666 No response 1 1881
888 Could not obtain 0 1881
. Missing 165 2046

AUXU4KR - Right threshold @ 4000Hz (db)

Variable Name:
AUXU4KR
SAS Label:
Right threshold @ 4000Hz (db)
English Text:
Right threshold @ 4000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 115 Range of Values 1877 1877
666 No response 3 1880
888 Could not obtain 0 1880
. Missing 166 2046

AUXU6KR - Right threshold @ 6000Hz (db)

Variable Name:
AUXU6KR
SAS Label:
Right threshold @ 6000Hz (db)
English Text:
Right threshold @ 6000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 120 Range of Values 1876 1876
666 No response 4 1880
888 Could not obtain 0 1880
. Missing 166 2046

AUXU8KR - Right threshold @ 8000Hz (db)

Variable Name:
AUXU8KR
SAS Label:
Right threshold @ 8000Hz (db)
English Text:
Right threshold @ 8000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 110 Range of Values 1876 1876
666 No response 4 1880
888 Could not obtain 0 1880
. Missing 166 2046

AUXU1K1L - Left threshold @ 1000Hz (db)

Variable Name:
AUXU1K1L
SAS Label:
Left threshold @ 1000Hz (db)
English Text:
Left threshold @ 1000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 100 Range of Values 1879 1879
666 No response 1 1880
888 Could not obtain 0 1880
. Missing 166 2046

AUXU500L - Left threshold @ 500Hz (db)

Variable Name:
AUXU500L
SAS Label:
Left threshold @ 500Hz (db)
English Text:
Left threshold @ 500Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 95 Range of Values 1881 1881
666 No response 1 1882
888 Could not obtain 0 1882
. Missing 164 2046

AUXU1K2L - Left threshold @ 1000Hz-2nd Read (db)

Variable Name:
AUXU1K2L
SAS Label:
Left threshold @ 1000Hz-2nd Read (db)
English Text:
Left threshold @ 1000Hz (second reading)in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 115 Range of Values 1881 1881
666 No response 0 1881
888 Could not obtain 0 1881
. Missing 165 2046

AUXU2KL - Left threshold @ 2000Hz (db)

Variable Name:
AUXU2KL
SAS Label:
Left threshold @ 2000Hz (db)
English Text:
Left threshold @ 2000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 120 Range of Values 1882 1882
666 No response 0 1882
888 Could not obtain 0 1882
. Missing 164 2046

AUXU3KL - Left threshold @ 3000Hz (db)

Variable Name:
AUXU3KL
SAS Label:
Left threshold @ 3000Hz (db)
English Text:
Left threshold @ 3000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 110 Range of Values 1880 1880
666 No response 2 1882
888 Could not obtain 0 1882
. Missing 164 2046

AUXU4KL - Left threshold @ 4000Hz (db)

Variable Name:
AUXU4KL
SAS Label:
Left threshold @ 4000Hz (db)
English Text:
Left threshold @ 4000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 120 Range of Values 1880 1880
666 No response 2 1882
888 Could not obtain 0 1882
. Missing 164 2046

AUXU6KL - Left threshold @ 6000Hz (db)

Variable Name:
AUXU6KL
SAS Label:
Left threshold @ 6000Hz (db)
English Text:
Left threshold @ 6000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 120 Range of Values 1881 1881
666 No response 1 1882
888 Could not obtain 0 1882
. Missing 164 2046

AUXU8KL - Left threshold @ 8000Hz (db)

Variable Name:
AUXU8KL
SAS Label:
Left threshold @ 8000Hz (db)
English Text:
Left threshold @ 8000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-10 to 110 Range of Values 1879 1879
666 No response 3 1882
888 Could not obtain 0 1882
. Missing 164 2046

AUXR1K1R - Right retest threshold @ 1000Hz (db)

Variable Name:
AUXR1K1R
SAS Label:
Right retest threshold @ 1000Hz (db)
English Text:
Right retest threshold @ 1000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
15 to 100 Range of Values 10 10
666 No response 0 10
888 Could not obtain 0 10
. Missing 2036 2046

AUXR5CR - Right retest threshold @ 500Hz (db)

Variable Name:
AUXR5CR
SAS Label:
Right retest threshold @ 500Hz (db)
English Text:
Right retest threshold @ 500Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
25 to 100 Range of Values 14 14
666 No response 0 14
888 Could not obtain 0 14
. Missing 2032 2046

AUXR1K2R - Right Retest Threshold 1000Hz-2nd Read

Variable Name:
AUXR1K2R
SAS Label:
Right Retest Threshold 1000Hz-2nd Read
English Text:
Right retest threshold @ 1000Hz, second reading (db)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
30 to 100 Range of Values 3 3
666 No response 0 3
888 Could not obtain 0 3
. Missing 2043 2046

AUXR2KR - Right retest threshold @ 2000Hz (db)

Variable Name:
AUXR2KR
SAS Label:
Right retest threshold @ 2000Hz (db)
English Text:
Right retest threshold @ 2000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
55 to 105 Range of Values 7 7
666 No response 0 7
888 Could not obtain 0 7
. Missing 2039 2046

AUXR3KR - Right retest threshold @ 3000Hz (db)

Variable Name:
AUXR3KR
SAS Label:
Right retest threshold @ 3000Hz (db)
English Text:
Right retest threshold @ 3000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
50 to 105 Range of Values 9 9
666 No response 0 9
888 Could not obtain 0 9
. Missing 2037 2046

AUXR4KR - Right retest threshold @ 4000Hz (db)

Variable Name:
AUXR4KR
SAS Label:
Right retest threshold @ 4000Hz (db)
English Text:
Right retest threshold @ 4000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
45 to 110 Range of Values 9 9
666 No response 0 9
888 Could not obtain 0 9
. Missing 2037 2046

AUXR6KR - Right retest threshold @ 6000Hz (db)

Variable Name:
AUXR6KR
SAS Label:
Right retest threshold @ 6000Hz (db)
English Text:
Right retest threshold @ 6000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5 to 105 Range of Values 14 14
666 No response 1 15
888 Could not obtain 0 15
. Missing 2031 2046

AUXR8KR - Right retest threshold @ 8000Hz (db)

Variable Name:
AUXR8KR
SAS Label:
Right retest threshold @ 8000Hz (db)
English Text:
Right retest threshold @ 8000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
50 to 95 Range of Values 10 10
666 No response 1 11
888 Could not obtain 0 11
. Missing 2035 2046

AUXR1K1L - Left retest threshold @ 1000Hz (db)

Variable Name:
AUXR1K1L
SAS Label:
Left retest threshold @ 1000Hz (db)
English Text:
Left retest threshold @ 1000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
30 to 75 Range of Values 13 13
666 No response 1 14
888 Could not obtain 0 14
. Missing 2032 2046

AUXR5CL - Left retest threshold @ 500Hz (db)

Variable Name:
AUXR5CL
SAS Label:
Left retest threshold @ 500Hz (db)
English Text:
Left retest threshold @ 500Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
10 to 100 Range of Values 17 17
666 No response 1 18
888 Could not obtain 0 18
. Missing 2028 2046

AUXR1K2L - Left Retest Threshold 1000-2nd Read

Variable Name:
AUXR1K2L
SAS Label:
Left Retest Threshold 1000-2nd Read
English Text:
Left retest threshold @ 1000Hz, second reading in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
20 to 70 Range of Values 3 3
666 No response 1 4
888 Could not obtain 0 4
. Missing 2042 2046

AUXR2KL - Left retest threshold @ 2000Hz (db)

Variable Name:
AUXR2KL
SAS Label:
Left retest threshold @ 2000Hz (db)
English Text:
Left retest threshold @ 2000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
30 to 75 Range of Values 5 5
666 No response 1 6
888 Could not obtain 0 6
. Missing 2040 2046

AUXR3KL - Left retest threshold @ 3000Hz (db)

Variable Name:
AUXR3KL
SAS Label:
Left retest threshold @ 3000Hz (db)
English Text:
Left retest threshold @ 3000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
45 to 75 Range of Values 15 15
666 No response 0 15
888 Could not obtain 0 15
. Missing 2031 2046

AUXR4KL - Left retest threshold @ 4000Hz (db)

Variable Name:
AUXR4KL
SAS Label:
Left retest threshold @ 4000Hz (db)
English Text:
Left retest threshold @ 4000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
20 to 100 Range of Values 25 25
666 No response 0 25
888 Could not obtain 0 25
. Missing 2021 2046

AUXR6KL - Left retest threshold @ 6000Hz (db)

Variable Name:
AUXR6KL
SAS Label:
Left retest threshold @ 6000Hz (db)
English Text:
Left retest threshold @ 6000Hz in decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
25 to 100 Range of Values 21 21
666 No response 0 21
888 Could not obtain 0 21
. Missing 2025 2046

AUXR8KL - Left retest threshold @ 8000Hz (db)

Variable Name:
AUXR8KL
SAS Label:
Left retest threshold @ 8000Hz (db)
English Text:
Left retest threshold @ 8000Hzin decibels (Hearing Level)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
15 to 100 Range of Values 25 25
666 No response 1 26
888 Could not obtain 0 26
. Missing 2020 2046

AUAREQC - Right Ear Quality Code

Variable Name:
AUAREQC
SAS Label:
Right Ear Quality Code
English Text:
Right Ear Quality Code
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Good - tympanogram is smooth and symmetrical 1346 1346
2 Adequate - tympanogram is 'noisy' but adequate for interpretation 521 1867
3 Poor - tympanogram cannot be interpreted 9 1876
7 SP Refused Tympanometry 0 1876
9 Equivocal - tympanogram cannot be evaluated without further information 9 1885
888 CNO - technician could not obtain the tympanogram 9 1894
. Missing 152 2046

AUALEQC - Left Ear Quality Code

Variable Name:
AUALEQC
SAS Label:
Left Ear Quality Code
English Text:
Left Ear Quality Code
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Good - tympanogram is smooth and symmetrical 1324 1324
2 Adequate - tympanogram is 'noisy' but adequate for interpretation 528 1852
3 Poor - tympanogram cannot be interpreted 20 1872
7 SP Refused Tympanometry 1 1873
9 Equivocal - tympanogram cannot be evaluated without further information 16 1889
888 CNO - technician could not obtain the tympanogram 5 1894
. Missing 152 2046