Table of Contents

Locator Record

Title: Blood Pressure (BPX )
Contact Number: 1-866-441-NCHS
Years of Content: 1999 - 2000
First Published: June, 2002
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:blood pressure
Record Source: NHANES 1999 - 2000
Survey Methodology: NHANES 1999 - 2000 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

To support public health program in the control and prevention of CVD, 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.

Eligible Sample

There are no exclusion criteria.

Protocol and Procedure

Data Collection Methods

Three and sometimes 4 BP determinations (systolic and diastolic) are taken in the mobile examination center (MEC) and during home examinations on all eligible individuals using a mercury sphygmomanometer.

Participants who are 50 years and older or less than one year of age who are unable to travel to the MEC are offered an abbreviated examination in their homes. Blood pressure measurements are taken by one of the MEC examiners.

Examination Protocol

The technique used to obtain BP follows the latest recommendations of the American Heart Association Human Blood Pressure Determination by sphygmomanometers (Perloff et al.).

Survey Staff

Two physicians (MEC setting) and 2 health technologists (Home Examination setting) are trained to collect NHANES BP data using a standardized protocol.

Quality Assurance & Quality Control

The quality control procedure includes the following elements: initial extensive training; quarterly re-certification by an expert consultant during field visits; a quality assurance plan including a procedural checklist; and continuous review of the data for systematic error.

The first recertification for the blood pressure component was conducted six months after the start of NHANES 1999; quarterly recertification training has been conducted since that time.

Please refer to the NHANES Quality Control Manual for more detailed information about the blood pressure protocol.

Data Processing and Editing

BP determinations are recorded directly onto a computerized data collection form. The system is centrally integrated and it allows for ongoing monitoring of the data.

Analytic Notes

The variables BPXSAR and BPXDAR represent blood pressure results that were reported to the examinee. They do not represent traditional averages. These variables were calculated using the following protocol:

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 2 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Complete 8958 8958
2 Partial 38 8996
3 Not done 286 9282
. Missing 0 9282

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 2 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 4051 Range of Values 9282 9282
. Missing 0 9282

PEASCCT1 - Blood Pressure Comment

Variable Name:
PEASCCT1
SAS Label:
Blood Pressure Comment
English Text:
Blood Pressure Comment
Target:
Both males and females 2 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 8960 8960
1 Safety exclusion 3 8963
2 SP refusal 52 9015
3 No time 15 9030
4 Physical limitation 7 9037
5 Communication problem 4 9041
6 Equipment failure 1 9042
7 SP ill/emergency 9 9051
56 Came late/left early 174 9225
99 Other, specify 57 9282
. Missing 0 9282

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
50 to 180 Range of Values 1744 1744
. Missing 7538 9282

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 2022 2022
2 No 5238 7260
. Missing 2022 9282

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 4 4
2 No 7256 7260
. Missing 2022 9282

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 30 30
2 No 7230 7260
. Missing 2022 9282

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 79 79
2 No 7181 7260
. Missing 2022 9282

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 7209 7209
2 Left 39 7248
8 Could not obtain 12 7260
. Missing 2022 9282

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) 6 6
2 Child (9X17) 1374 1380
3 Adult (12X22) 3480 4860
4 Large (15X32) 2050 6910
5 Thigh (18X35) 334 7244
. Missing 2038 9282

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
36 to 142 Range of Values 7253 7253
. Missing 2029 9282

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 6 Range of Values 57 57
. Missing 9225 9282

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 8736 8736
2 Irregular 267 9003
. Missing 279 9282

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 7247 7247
2 Brachial 9 7256
8 Could not obtain 0 7256
. Missing 2026 9282

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
100 to 260 Range of Values 7229 7229
888 Could not obtain 0 7229
. Missing 2053 9282

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
74 to 242 Range of Values 6457 6457
. Missing 2825 9282

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 132 Range of Values 6457 6457
. Missing 2825 9282

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 2 2
2 No 7226 7228
8 Could not obtain 0 7228
. Missing 2054 9282

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
72 to 226 Range of Values 6368 6368
. Missing 2914 9282

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 128 Range of Values 6368 6368
. Missing 2914 9282

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 75 75
2 No 7153 7228
8 Could not obtain 0 7228
. Missing 2054 9282

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
74 to 232 Range of Values 6256 6256
. Missing 3026 9282

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 120 Range of Values 6255 6255
. Missing 3027 9282

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 100 100
2 No 7128 7228
8 Could not obtain 0 7228
. Missing 2054 9282

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
72 to 234 Range of Values 1643 1643
. Missing 7639 9282

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 136 Range of Values 1643 1643
. Missing 7639 9282

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 52 52
2 No 2084 2136
8 Could not obtain 0 2136
. Missing 7146 9282

BPXSAR - SBP average reported to examinee

Variable Name:
BPXSAR
SAS Label:
SBP average reported to examinee
English Text:
Systolic blood pressure average:
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
73 to 233 Range of Values 7215 7215
. Missing 2067 9282

BPXDAR - DBP average reported to examinee

Variable Name:
BPXDAR
SAS Label:
DBP average reported to examinee
English Text:
Diastolic blood pressure average:
Target:
Both males and females 8 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 132 Range of Values 7215 7215
. Missing 2067 9282