Table of Contents

Locator Record

Title: Blood Pressure (BPX_C )
Contact Number: 1-866-441-NCHS
Years of Content: 2003 - 2004
First Published: December, 2005
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:Blood Pressure Measurement
Record Source: NHANES 2003 - 2004
Survey Methodology: NHANES 2003 - 2004 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

Accurate measurement of blood pressure (BP) is a major public health concern; it is essential for hypertension screening, as well as for disease management. Hypertension is a powerful, consistent, and independent risk factor for cardiovascular disease and renal disease.

Eligible Sample

Heart rate is measured on all children 0-4 years of age; radial pulse is measured on examinees 5 years and older; and blood pressure (BP) is measured on all examinees 8 years and over. There are no exclusion criteria.

Protocol and Procedure

After resting quietly in a sitting position for 5 minutes and determining the maximum inflation level (MIL), three and sometimes 4 BP determinations (systolic and diastolic) are taken in the mobile examination center (MEC).

Quality Assurance & Quality Control

The BP examiners are certified for blood pressure measurement through a training program from Shared Care Research and Education Consulting. The program includes a didactic section, audio-video practice watching and listening to systolic and diastolic blood pressure sounds, and measuring blood pressures of volunteers concurrently with a certified, gold standard BP instructor. Certification is achieved when physician examiners meet all requirements of the training program. The initial training includes:

Certification requires a score of 100 per cent on the audio-video tape test. Correct answers on the audio-video tape test require the examiner’s answers and the standardized test answers to be within +/- 2mm mercury (Hg) on 92 per cent of 24 measures (12 systolic, 12 diastolic), and within +/- 4mm Hg on 100 percent of 24 measures (12 systolic, 12 diastolic). For more information on quality assurance and control, see Ostchega et al. (Ostchega, 2003).

For more details on the QA/QC process for this component, please refer to the Physician Section of the MEC Operations Manual.

Data Processing and Editing

The following are some hard edit specifications used in capturing the BP data:

Analytic Notes

Please refer to the Analytic Guidelines for further details on the use of sample weights and other analytic issues at http://www.cdc.gov/nchs/nhanes/nhanes2003-2004/analytical_guidelines.htm.

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 0 YEARS - 150 YEARS

PEASCST1 - Blood Pressure Status

Variable Name:
PEASCST1
SAS Label:
Blood Pressure Status
English Text:
Blood Pressure Status
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Complete 9194 9194
2 Partial 104 9298
3 Not done 345 9643
. Missing 0 9643

PEASCTM1 - Blood Pressure Time in Seconds

Variable Name:
PEASCTM1
SAS Label:
Blood Pressure Time in Seconds
English Text:
Blood Pressure Time in Seconds
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 1933 Range of Values 9337 9337
. Missing 306 9643

PEASCCT1 - Blood Pressure Comment

Variable Name:
PEASCCT1
SAS Label:
Blood Pressure Comment
English Text:
Blood Pressure Comment
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Safety exclusion 2 2
2 SP refusal 121 123
3 No time 46 169
4 Physical limitation 58 227
5 Communication problem 1 228
7 SP ill/emergency 8 236
72 Error (technician/software/supply) 1 237
84 SP with child 4 241
99 Other, specify 208 449
. Missing 9194 9643

BPXCHR - 60 sec HR (30 sec HR * 2)

Variable Name:
BPXCHR
SAS Label:
60 sec HR (30 sec HR * 2)
English Text:
60 sec HR (30 sec HR * 2)
Target:
Both males and females 0 YEARS - 7 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 280 Range of Values 1938 1938
. Missing 7705 9643

BPQ150A - Had food in the past 30 minutes?

Variable Name:
BPQ150A
SAS Label:
Had food in the past 30 minutes?
English Text:
Have you had any of the following in the past 30 minutes?: Food
English Instructions:
Check each that applies
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 2530 2530
2 No 4873 7403
. Missing 2240 9643

BPQ150B - Had alcohol in the past 30 minutes?

Variable Name:
BPQ150B
SAS Label:
Had alcohol in the past 30 minutes?
English Text:
Have you had any of the following in the past 30 minutes?: Alcohol
English Instructions:
Check each that applies
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 2 2
2 No 7401 7403
. Missing 2240 9643

BPQ150C - Had coffee in the past 30 minutes?

Variable Name:
BPQ150C
SAS Label:
Had coffee in the past 30 minutes?
English Text:
Have you had any of the following in the past 30 minutes?: Coffee
English Instructions:
Check each that applies
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 16 16
2 No 7387 7403
. Missing 2240 9643

BPQ150D - Had cigarettes in the past 30 minutes?

Variable Name:
BPQ150D
SAS Label:
Had cigarettes in the past 30 minutes?
English Text:
Have you had any of the following in the past 30 minutes?: Cigarettes
English Instructions:
Check each that applies
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 67 67
2 No 7336 7403
. Missing 2240 9643

BPAARM - Arm selected:

Variable Name:
BPAARM
SAS Label:
Arm selected:
English Text:
Arm selected:
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Right 7287 7287
2 Left 35 7322
8 Could not obtain 80 7402
. Missing 2241 9643

BPACSZ - Coded cuff size

Variable Name:
BPACSZ
SAS Label:
Coded cuff size
English Text:
Cuff size (cm) (width X length)
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Infant (6X12) 0 0
2 Child (9X17) 394 394
3 Adult (12X22) 2769 3163
4 Large (15X32) 3347 6510
5 Thigh (18X35) 781 7291
. Missing 2352 9643

BPXPLS - 60 sec. pulse (30 sec. pulse * 2):

Variable Name:
BPXPLS
SAS Label:
60 sec. pulse (30 sec. pulse * 2):
English Text:
60 sec. pulse (30 sec. pulse * 2):
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
32 to 144 Range of Values 7361 7361
. Missing 2282 9643

BPXDB - # of dropped beats in 30 seconds

Variable Name:
BPXDB
SAS Label:
# of dropped beats in 30 seconds
English Text:
# of dropped beats in 30 seconds
Target:
Both males and females 12 YEARS - 49 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 10 Range of Values 45 45
. Missing 9598 9643

BPXPULS - Pulse regular or irregular?

Variable Name:
BPXPULS
SAS Label:
Pulse regular or irregular?
English Text:
Pulse regular or irregular?
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Regular 9013 9013
2 Irregular 320 9333
. Missing 310 9643

BPXPTY - Pulse type:

Variable Name:
BPXPTY
SAS Label:
Pulse type:
English Text:
Pulse type:
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Radial 7379 7379
2 Brachial 13 7392
8 Could not obtain 0 7392
. Missing 2251 9643

BPXML1 - MIL: maximum inflation levels (mm Hg)

Variable Name:
BPXML1
SAS Label:
MIL: maximum inflation levels (mm Hg)
English Text:
MIL: maximum inflation levels (mm Hg)
Target:
Both males and females 8 YEARS - 150 YEARS
Hard Edits:
70.0000 to 300.0000
Code or Value Value Description Count Cumulative Skip to Item
110 to 290 Range of Values 7277 7277
888 Could not obtain 0 7277
. Missing 2366 9643

BPXSY1 - Systolic: Blood pres (1st rdg) mm Hg

Variable Name:
BPXSY1
SAS Label:
Systolic: Blood pres (1st rdg) mm Hg
English Text:
Systolic: Blood pressure (first reading) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
72 to 240 Range of Values 6274 6274
. Missing 3369 9643

BPXDI1 - Diastolic: Blood pres (1st rdg) mm Hg

Variable Name:
BPXDI1
SAS Label:
Diastolic: Blood pres (1st rdg) mm Hg
English Text:
Diastolic: Blood pressure (first reading) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 120 Range of Values 6274 6274
. Missing 3369 9643

BPAEN1 - Enhancement used first reading

Variable Name:
BPAEN1
SAS Label:
Enhancement used first reading
English Text:
Enhancement used first reading
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 0 0
2 No 7277 7277
8 Could not obtain 0 7277
. Missing 2366 9643

BPXSY2 - Systolic: Blood pres (2nd rdg) mm Hg

Variable Name:
BPXSY2
SAS Label:
Systolic: Blood pres (2nd rdg) mm Hg
English Text:
Systolic: Blood pressure (second reading) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
70 to 256 Range of Values 5762 5762
. Missing 3881 9643

BPXDI2 - Diastolic: Blood pres (2nd rdg) mm Hg

Variable Name:
BPXDI2
SAS Label:
Diastolic: Blood pres (2nd rdg) mm Hg
English Text:
Diastolic: Blood pressure (second reading) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 116 Range of Values 5762 5762
. Missing 3881 9643

BPAEN2 - Enhancement used second reading

Variable Name:
BPAEN2
SAS Label:
Enhancement used second reading
English Text:
Enhancement used second reading
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 81 81
2 No 7197 7278
8 Could not obtain 0 7278
. Missing 2365 9643

BPXSY3 - Systolic: Blood pres (3rd rdg) mm Hg

Variable Name:
BPXSY3
SAS Label:
Systolic: Blood pres (3rd rdg) mm Hg
English Text:
Systolic: Blood pressure (third reading) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
68 to 226 Range of Values 5658 5658
. Missing 3985 9643

BPXDI3 - Diastolic: Blood pres (3rd rdg) mm Hg

Variable Name:
BPXDI3
SAS Label:
Diastolic: Blood pres (3rd rdg) mm Hg
English Text:
Diastolic: Blood pressure (third reading) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 114 Range of Values 5658 5658
. Missing 3985 9643

BPAEN3 - Enhancement used third reading

Variable Name:
BPAEN3
SAS Label:
Enhancement used third reading
English Text:
Enhancement used third reading
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 115 115
2 No 7160 7275
8 Could not obtain 0 7275
. Missing 2368 9643

BPXSY4 - Systolic: Blood pres (4th rdg) mm Hg

Variable Name:
BPXSY4
SAS Label:
Systolic: Blood pres (4th rdg) mm Hg
English Text:
Systolic: Blood pressure (fourth reading if necessary) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
80 to 248 Range of Values 1596 1596
. Missing 8047 9643

BPXDI4 - Diastolic: Blood pres (4th rdg) mm Hg

Variable Name:
BPXDI4
SAS Label:
Diastolic: Blood pres (4th rdg) mm Hg
English Text:
Diastolic: Blood pressure (fourth reading if necessary) mm Hg
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 108 Range of Values 1596 1596
. Missing 8047 9643

BPAEN4 - Enhancement used fourth reading

Variable Name:
BPAEN4
SAS Label:
Enhancement used fourth reading
English Text:
Enhancement used fourth reading
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 81 81
2 No 2795 2876
8 Could not obtain 0 2876
. Missing 6767 9643