National Health and Nutrition Examination Survey

1999-2000 Data Documentation, Codebook, and Frequencies

Balance (BAX)

Data File: BAX.xpt

First Published: June 2002

Last Revised: June 2005

Component Description

Balance disorders constitute a major Public Health concern, especially for older persons, an increasing segment of the U.S. general population. For example, balance disorders are causally related to the some 200,000 hip fractures that occur annually in Americans over the age of 65. The objectives of the Balance Component are to obtain accurate prevalence data on balance problems among a sample of U.S. adults, to examine the relationship between balance problems and specific covariates such as certain medical conditions and indicators of health status, and to help characterize normal and disordered balance and spatial perception.

The NHANES 1999–2000 Balance Component consisted of two parts:

A pre-exam screening questionnaire: This is a series of questions to identify conditions which would constitute either practical or safety exclusions to performing Balance testing. Please note that more extensive survey questions relating to balance problems are contained in the BAQ section of the NHANES household survey questionnaire.
Balance Testing: This part consisted of a modified Romberg Test of Standing Balance on Firm and Complaint Support Surfaces. (Weber)

Eligible Sample

The 1999–2000 Balance Component tested a 1/2 sample of U.S. adults ages 40–69 years. Subjects were excluded from the Balance testing protocol if at the time of the exam, they felt unable to stand on their own, were then currently having dizziness sufficient to cause unsteadiness, weighed over 275 lbs, had a waist circumference either too small or too large to accommodate proper fitting of any standard-sized safety gait belt, if they needed a leg brace in order to stand unassisted, or had an amputation of their feet or legs. In addition subjects who were totally blind or visually impaired sufficiently to require assistance in finding the exam room were disqualified.

Protocol and Procedure

The Romberg Test of Standing Balance on Firm and Compliant Support Surfaces examines the ability of the examinee to stand unassisted under four test conditions, ordered in increasing level of difficulty. In Test Condition 1, the subject stands making use of all the sensory inputs that contribute to balance— the central vestibular system, vision, and proprioception (leg muscle position sense). Test Condition 2 tests balance when only vestibular and proprioceptive information is available (the subject closes the eyes to eliminate visual input). In Test Condition 3, the subject must maintain balance on a foam-padded surface, which reduces the proprioceptive input, leaving only visual and vestibular cues. Finally, in Test Condition 4 (also using a foam pad) the eyes are again closed (visual input is removed) and the subject's ability to maintain balance is tested using only the vestibular system.

All Balance Testing was scored on a pass/fail basis, with Test Conditions 1 and 2 conducted for a total of 15 seconds, and Test Conditions 3 & 4 conducted for 30 seconds each. Test failure was defined as 1) a subject needing to open the eyes in an eyes-closed Test Condition (#2 or #4), 2) the subject moved the arms or feet in order to achieve stability, or 3) the subject began to fall or required MEC Technician intervention to maintain balance.

In the standard Balance Testing protocol, each subject is eligible for an initial test and one re-test in order to pass a specific Test Condition. Within each Test Condition, the protocol for retesting is the same as for the primary examination. Because each successive Test Condition from 1 to 4 is progressively more difficult than the Condition preceding it, the Balance Testing Component is ended whenever a subject fails to pass a Test Condition.

Balance testing was conducted with the utmost consideration for subject safety. The examining MEC Technician stood immediately to the side of the participant prepared to stabilize the subject by the use of a safety gait belt should significant unsteadiness occur. Also, the examination was conducted in a small exam room, with well padded walls and floor.

The complete NHANES Balance Examination Procedures Manual is located at https://wwwn.cdc.gov/nchs/data/nhanes/1999-2000/manuals/ba.pdf.

Quality Assurance & Quality Control

The NHANES Health Technicians were professionally trained in the Modified Romberg Testing protocol by an expert consultant in Balance and Vestibular disorders. In addition, Audiologic consultants from the National Institute of Occupational Safety & Health (NIOSH) provided performance monitoring of each Technician on a regular basis. Also, NCHS staff visited the MECs approximately twice per year to observe the Balance examinations and verify Compliance with standard testing procedures. Finally, MEC Health Technicians received annual retraining and updates by the NIOSH consultants. Exclusion rates and outcome statistics for the examination component were continually monitored according to Technician and MEC, and retraining was conducted as necessary to maintain test quality.

Data Processing and Editing

All of the Balance Data were collected using automated data collection methods. A consulting NIOSH Audiologist performed data reviews. In addition, a computerized data review and editing process was utilized to check for logical inconsistencies in the data and technician errors, as well as to cross-check other issues affecting data quality. Back-end edits of the data were performed as necessary when errors were detected.

Analytic Notes

Data analysts should ideally be familiar with Balance and Vestibular disorders, or have a specialist available for consultation. The systematic differences in testing length (15 seconds for Conditions 1 & 2; 30 seconds for Conditions 3 & 4) may also need to be taken into account in the analysis of the data.

Because the 1999–2000 Balance Examination was conducted on a ½ sample of U.S. adults ages 40–69 years, the standard NHANES full sample MEC examination weights cannot be used for statistical analysis. For analysis of the 1999–2000 Balance data, special Balance Sub-Sample 2-Year MEC weights were created and are provided along with the 1999–2000 Balance Examination data file.

References

Weber PC, Cass SP. Clinical assessment of postural stability. Am J Otol. 1993;14:566-9.

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 40 YEARS - 69 YEARS

WTSBA2YR - Balance Subsample 2 Year Mec Weight

Variable Name:: WTSBA2YR
SAS Label:: Balance Subsample 2 Year Mec Weight
English Text:: Balance Subsample 2 Year Mec Weight
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
2935.9948217 to 350744.24731	Range of Values	946	946
.	Missing	65	1011

WTSBA4YR - Balance Subsample 4 Year Mec Weight

Variable Name:: WTSBA4YR
SAS Label:: Balance Subsample 4 Year Mec Weight
English Text:: Balance Subsample 4 Year Mec Weight
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1366.1662625 to 100150.54861	Range of Values	946	946
.	Missing	65	1011

WTSBA01 - Balance Mec Weight Jack Knife Rep 1

Variable Name:: WTSBA01
SAS Label:: Balance Mec Weight Jack Knife Rep 1
English Text:: Balance Mec Weight Jack Knife Rep 1
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 360153.38487	Range of Values	946	946
.	Missing	65	1011

WTSBA02 - Balance Mec Weight Jack Knife Rep 2

Variable Name:: WTSBA02
SAS Label:: Balance Mec Weight Jack Knife Rep 2
English Text:: Balance Mec Weight Jack Knife Rep 2
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 351844.8247	Range of Values	946	946
.	Missing	65	1011

WTSBA03 - Balance Mec Weight Jack Knife Rep 3

Variable Name:: WTSBA03
SAS Label:: Balance Mec Weight Jack Knife Rep 3
English Text:: Balance Mec Weight Jack Knife Rep 3
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 350887.63104	Range of Values	946	946
.	Missing	65	1011

WTSBA04 - Balance Mec Weight Jack Knife Rep 4

Variable Name:: WTSBA04
SAS Label:: Balance Mec Weight Jack Knife Rep 4
English Text:: Balance Mec Weight Jack Knife Rep 4
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 352643.61016	Range of Values	946	946
.	Missing	65	1011

WTSBA05 - Balance Mec Weight Jack Knife Rep 5

Variable Name:: WTSBA05
SAS Label:: Balance Mec Weight Jack Knife Rep 5
English Text:: Balance Mec Weight Jack Knife Rep 5
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 353191.16171	Range of Values	946	946
.	Missing	65	1011

WTSBA06 - Balance Mec Weight Jack Knife Rep 6

Variable Name:: WTSBA06
SAS Label:: Balance Mec Weight Jack Knife Rep 6
English Text:: Balance Mec Weight Jack Knife Rep 6
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 356953.17018	Range of Values	946	946
.	Missing	65	1011

WTSBA07 - Balance Mec Weight Jack Knife Rep 7

Variable Name:: WTSBA07
SAS Label:: Balance Mec Weight Jack Knife Rep 7
English Text:: Balance Mec Weight Jack Knife Rep 7
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 354449.94828	Range of Values	946	946
.	Missing	65	1011

WTSBA08 - Balance Mec Weight Jack Knife Rep 8

Variable Name:: WTSBA08
SAS Label:: Balance Mec Weight Jack Knife Rep 8
English Text:: Balance Mec Weight Jack Knife Rep 8
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 353089.06284	Range of Values	946	946
.	Missing	65	1011

WTSBA09 - Balance Mec Weight Jack Knife Rep 9

Variable Name:: WTSBA09
SAS Label:: Balance Mec Weight Jack Knife Rep 9
English Text:: Balance Mec Weight Jack Knife Rep 9
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 355008.51327	Range of Values	946	946
.	Missing	65	1011

WTSBA10 - Balance Mec Weight Jack Knife Rep 10

Variable Name:: WTSBA10
SAS Label:: Balance Mec Weight Jack Knife Rep 10
English Text:: Balance Mec Weight Jack Knife Rep 10
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 363238.91886	Range of Values	946	946
.	Missing	65	1011

WTSBA11 - Balance Mec Weight Jack Knife Rep 11

Variable Name:: WTSBA11
SAS Label:: Balance Mec Weight Jack Knife Rep 11
English Text:: Balance Mec Weight Jack Knife Rep 11
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 376419.25428	Range of Values	946	946
.	Missing	65	1011

WTSBA12 - Balance Mec Weight Jack Knife Rep 12

Variable Name:: WTSBA12
SAS Label:: Balance Mec Weight Jack Knife Rep 12
English Text:: Balance Mec Weight Jack Knife Rep 12
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 366022.29632	Range of Values	946	946
.	Missing	65	1011

WTSBA13 - Balance Mec Weight Jack Knife Rep 13

Variable Name:: WTSBA13
SAS Label:: Balance Mec Weight Jack Knife Rep 13
English Text:: Balance Mec Weight Jack Knife Rep 13
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 350310.73558	Range of Values	946	946
.	Missing	65	1011

WTSBA14 - Balance Mec Weight Jack Knife Rep 14

Variable Name:: WTSBA14
SAS Label:: Balance Mec Weight Jack Knife Rep 14
English Text:: Balance Mec Weight Jack Knife Rep 14
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 364881.46949	Range of Values	946	946
.	Missing	65	1011

WTSBA15 - Balance Mec Weight Jack Knife Rep 15

Variable Name:: WTSBA15
SAS Label:: Balance Mec Weight Jack Knife Rep 15
English Text:: Balance Mec Weight Jack Knife Rep 15
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 369757.95073	Range of Values	946	946
.	Missing	65	1011

WTSBA16 - Balance Mec Weight Jack Knife Rep 16

Variable Name:: WTSBA16
SAS Label:: Balance Mec Weight Jack Knife Rep 16
English Text:: Balance Mec Weight Jack Knife Rep 16
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 383577.63521	Range of Values	946	946
.	Missing	65	1011

WTSBA17 - Balance Mec Weight Jack Knife Rep 17

Variable Name:: WTSBA17
SAS Label:: Balance Mec Weight Jack Knife Rep 17
English Text:: Balance Mec Weight Jack Knife Rep 17
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 356407.13236	Range of Values	946	946
.	Missing	65	1011

WTSBA18 - Balance Mec Weight Jack Knife Rep 18

Variable Name:: WTSBA18
SAS Label:: Balance Mec Weight Jack Knife Rep 18
English Text:: Balance Mec Weight Jack Knife Rep 18
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 357359.01204	Range of Values	946	946
.	Missing	65	1011

WTSBA19 - Balance Mec Weight Jack Knife Rep 19

Variable Name:: WTSBA19
SAS Label:: Balance Mec Weight Jack Knife Rep 19
English Text:: Balance Mec Weight Jack Knife Rep 19
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 361319.11587	Range of Values	946	946
.	Missing	65	1011

WTSBA20 - Balance Mec Weight Jack Knife Rep 20

Variable Name:: WTSBA20
SAS Label:: Balance Mec Weight Jack Knife Rep 20
English Text:: Balance Mec Weight Jack Knife Rep 20
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 351176.92629	Range of Values	946	946
.	Missing	65	1011

WTSBA21 - Balance Mec Weight Jack Knife Rep 21

Variable Name:: WTSBA21
SAS Label:: Balance Mec Weight Jack Knife Rep 21
English Text:: Balance Mec Weight Jack Knife Rep 21
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 348215.59345	Range of Values	946	946
.	Missing	65	1011

WTSBA22 - Balance Mec Weight Jack Knife Rep 22

Variable Name:: WTSBA22
SAS Label:: Balance Mec Weight Jack Knife Rep 22
English Text:: Balance Mec Weight Jack Knife Rep 22
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 351495.21609	Range of Values	946	946
.	Missing	65	1011

WTSBA23 - Balance Mec Weight Jack Knife Rep 23

Variable Name:: WTSBA23
SAS Label:: Balance Mec Weight Jack Knife Rep 23
English Text:: Balance Mec Weight Jack Knife Rep 23
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 360187.8789	Range of Values	946	946
.	Missing	65	1011

WTSBA24 - Balance Mec Weight Jack Knife Rep 24

Variable Name:: WTSBA24
SAS Label:: Balance Mec Weight Jack Knife Rep 24
English Text:: Balance Mec Weight Jack Knife Rep 24
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 354951.09961	Range of Values	946	946
.	Missing	65	1011

WTSBA25 - Balance Mec Weight Jack Knife Rep 25

Variable Name:: WTSBA25
SAS Label:: Balance Mec Weight Jack Knife Rep 25
English Text:: Balance Mec Weight Jack Knife Rep 25
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 350470.2136	Range of Values	946	946
.	Missing	65	1011

WTSBA26 - Balance Mec Weight Jack Knife Rep 26

Variable Name:: WTSBA26
SAS Label:: Balance Mec Weight Jack Knife Rep 26
English Text:: Balance Mec Weight Jack Knife Rep 26
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 357091.55847	Range of Values	946	946
.	Missing	65	1011

WTSBA27 - Balance Mec Weight Jack Knife Rep 27

Variable Name:: WTSBA27
SAS Label:: Balance Mec Weight Jack Knife Rep 27
English Text:: Balance Mec Weight Jack Knife Rep 27
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 377886.65693	Range of Values	946	946
.	Missing	65	1011

WTSBA28 - Balance Mec Weight Jack Knife Rep 28

Variable Name:: WTSBA28
SAS Label:: Balance Mec Weight Jack Knife Rep 28
English Text:: Balance Mec Weight Jack Knife Rep 28
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 362964.50606	Range of Values	946	946
.	Missing	65	1011

WTSBA29 - Balance Mec Weight Jack Knife Rep 29

Variable Name:: WTSBA29
SAS Label:: Balance Mec Weight Jack Knife Rep 29
English Text:: Balance Mec Weight Jack Knife Rep 29
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 348899.35693	Range of Values	946	946
.	Missing	65	1011

WTSBA30 - Balance Mec Weight Jack Knife Rep 30

Variable Name:: WTSBA30
SAS Label:: Balance Mec Weight Jack Knife Rep 30
English Text:: Balance Mec Weight Jack Knife Rep 30
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 356116.61975	Range of Values	946	946
.	Missing	65	1011

WTSBA31 - Balance Mec Weight Jack Knife Rep 31

Variable Name:: WTSBA31
SAS Label:: Balance Mec Weight Jack Knife Rep 31
English Text:: Balance Mec Weight Jack Knife Rep 31
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 350552.93176	Range of Values	946	946
.	Missing	65	1011

WTSBA32 - Balance Mec Weight Jack Knife Rep 32

Variable Name:: WTSBA32
SAS Label:: Balance Mec Weight Jack Knife Rep 32
English Text:: Balance Mec Weight Jack Knife Rep 32
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 369254.9675	Range of Values	946	946
.	Missing	65	1011

WTSBA33 - Balance Mec Weight Jack Knife Rep 33

Variable Name:: WTSBA33
SAS Label:: Balance Mec Weight Jack Knife Rep 33
English Text:: Balance Mec Weight Jack Knife Rep 33
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 363632.43769	Range of Values	946	946
.	Missing	65	1011

WTSBA34 - Balance Mec Weight Jack Knife Rep 34

Variable Name:: WTSBA34
SAS Label:: Balance Mec Weight Jack Knife Rep 34
English Text:: Balance Mec Weight Jack Knife Rep 34
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 349435.93	Range of Values	946	946
.	Missing	65	1011

WTSBA35 - Balance Mec Weight Jack Knife Rep 35

Variable Name:: WTSBA35
SAS Label:: Balance Mec Weight Jack Knife Rep 35
English Text:: Balance Mec Weight Jack Knife Rep 35
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 354148.37842	Range of Values	946	946
.	Missing	65	1011

WTSBA36 - Balance Mec Weight Jack Knife Rep 36

Variable Name:: WTSBA36
SAS Label:: Balance Mec Weight Jack Knife Rep 36
English Text:: Balance Mec Weight Jack Knife Rep 36
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 366816.18197	Range of Values	946	946
.	Missing	65	1011

WTSBA37 - Balance Mec Weight Jack Knife Rep 37

Variable Name:: WTSBA37
SAS Label:: Balance Mec Weight Jack Knife Rep 37
English Text:: Balance Mec Weight Jack Knife Rep 37
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 349655.47352	Range of Values	946	946
.	Missing	65	1011

WTSBA38 - Balance Mec Weight Jack Knife Rep 38

Variable Name:: WTSBA38
SAS Label:: Balance Mec Weight Jack Knife Rep 38
English Text:: Balance Mec Weight Jack Knife Rep 38
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 363134.13884	Range of Values	946	946
.	Missing	65	1011

WTSBA39 - Balance Mec Weight Jack Knife Rep 39

Variable Name:: WTSBA39
SAS Label:: Balance Mec Weight Jack Knife Rep 39
English Text:: Balance Mec Weight Jack Knife Rep 39
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 352558.9777	Range of Values	946	946
.	Missing	65	1011

WTSBA40 - Balance Mec Weight Jack Knife Rep 40

Variable Name:: WTSBA40
SAS Label:: Balance Mec Weight Jack Knife Rep 40
English Text:: Balance Mec Weight Jack Knife Rep 40
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 361622.10999	Range of Values	946	946
.	Missing	65	1011

WTSBA41 - Balance Mec Weight Jack Knife Rep 41

Variable Name:: WTSBA41
SAS Label:: Balance Mec Weight Jack Knife Rep 41
English Text:: Balance Mec Weight Jack Knife Rep 41
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 363049.91799	Range of Values	946	946
.	Missing	65	1011

WTSBA42 - Balance Mec Weight Jack Knife Rep 42

Variable Name:: WTSBA42
SAS Label:: Balance Mec Weight Jack Knife Rep 42
English Text:: Balance Mec Weight Jack Knife Rep 42
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 364029.28153	Range of Values	946	946
.	Missing	65	1011

WTSBA43 - Balance Mec Weight Jack Knife Rep 43

Variable Name:: WTSBA43
SAS Label:: Balance Mec Weight Jack Knife Rep 43
English Text:: Balance Mec Weight Jack Knife Rep 43
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 364283.52363	Range of Values	946	946
.	Missing	65	1011

WTSBA44 - Balance Mec Weight Jack Knife Rep 44

Variable Name:: WTSBA44
SAS Label:: Balance Mec Weight Jack Knife Rep 44
English Text:: Balance Mec Weight Jack Knife Rep 44
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 358497.69133	Range of Values	946	946
.	Missing	65	1011

WTSBA45 - Balance Mec Weight Jack Knife Rep 45

Variable Name:: WTSBA45
SAS Label:: Balance Mec Weight Jack Knife Rep 45
English Text:: Balance Mec Weight Jack Knife Rep 45
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 358768.25419	Range of Values	946	946
.	Missing	65	1011

WTSBA46 - Balance Mec Weight Jack Knife Rep 46

Variable Name:: WTSBA46
SAS Label:: Balance Mec Weight Jack Knife Rep 46
English Text:: Balance Mec Weight Jack Knife Rep 46
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 359229.21348	Range of Values	946	946
.	Missing	65	1011

WTSBA47 - Balance Mec Weight Jack Knife Rep 47

Variable Name:: WTSBA47
SAS Label:: Balance Mec Weight Jack Knife Rep 47
English Text:: Balance Mec Weight Jack Knife Rep 47
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 349293.04318	Range of Values	946	946
.	Missing	65	1011

WTSBA48 - Balance Mec Weight Jack Knife Rep 48

Variable Name:: WTSBA48
SAS Label:: Balance Mec Weight Jack Knife Rep 48
English Text:: Balance Mec Weight Jack Knife Rep 48
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 350835.76421	Range of Values	946	946
.	Missing	65	1011

WTSBA49 - Balance Mec Weight Jack Knife Rep 49

Variable Name:: WTSBA49
SAS Label:: Balance Mec Weight Jack Knife Rep 49
English Text:: Balance Mec Weight Jack Knife Rep 49
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 350114.48266	Range of Values	946	946
.	Missing	65	1011

WTSBA50 - Balance Mec Weight Jack Knife Rep 50

Variable Name:: WTSBA50
SAS Label:: Balance Mec Weight Jack Knife Rep 50
English Text:: Balance Mec Weight Jack Knife Rep 50
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 360937.2258	Range of Values	946	946
.	Missing	65	1011

WTSBA51 - Balance Mec Weight Jack Knife Rep 51

Variable Name:: WTSBA51
SAS Label:: Balance Mec Weight Jack Knife Rep 51
English Text:: Balance Mec Weight Jack Knife Rep 51
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 361148.29898	Range of Values	946	946
.	Missing	65	1011

WTSBA52 - Balance Mec Weight Jack Knife Rep 52

Variable Name:: WTSBA52
SAS Label:: Balance Mec Weight Jack Knife Rep 52
English Text:: Balance Mec Weight Jack Knife Rep 52
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 356012.73145	Range of Values	946	946
.	Missing	65	1011

BAAEXSTS - Status of a MEC exam

Variable Name:: BAAEXSTS
SAS Label:: Status of a MEC exam
English Text:: Status of a MEC exam
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative
1	Complete	847	847
2	Partial	18	865
3	Not done	146	1011
.	Missing	0	1011

BAAEXCMT - Comment code for an exam

Variable Name:: BAAEXCMT
SAS Label:: Comment code for an exam
English Text:: Comment code for an exam
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative
1	Safety exclusion	84	84
2	SP refusal	19	103
3	No time	1	104
4	Physical limitation	14	118
5	Communication problem	2	120
7	SP ill/emergency	2	122
56	Came late/left early	31	153
99	Other, specify	11	164
.	Missing	847	1011

BAQ110 - Can you stand on your own?

Variable Name:: BAQ110
SAS Label:: Can you stand on your own?
English Text:: Can you stand on your own?
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	908	908
2	No	10	918
.	Missing	93	1011

BAQ120 - Do you have a leg brace?

Variable Name:: BAQ120
SAS Label:: Do you have a leg brace?
English Text:: Do you have a leg brace?
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	7	7
2	No	901	908
.	Missing	103	1011

BAQ130 - Feeling dizzy or lightheaded now?

Variable Name:: BAQ130
SAS Label:: Feeling dizzy or lightheaded now?
English Text:: Are you feeling any dizziness or lightheadedness now?
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	35	35
2	No	866	901
.	Missing	110	1011

BAXPFC11 - Cond 1 Trial 1 Feet together eyes open

Variable Name:: BAXPFC11
SAS Label:: Cond 1 Trial 1 Feet together eyes open
English Text:: Feet together eyes open:
English Instructions:: Stand in this position with your eyes open, looking at the target for as long as you can or until I ask you to stop. Please do not talk once the test begins. "Begin now."
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	849	849	BAXPFC21
2	Dnp(did not pass)	4	853
.	Missing	158	1011

BAXFTC11 - Cond 1 Trial 1 Failure Time(seconds)

Variable Name:: BAXFTC11
SAS Label:: Cond 1 Trial 1 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 14

Code or Value	Value Description	Count	Cumulative	Skip to Item
3 to 10	Range of Values	4	4
.	Missing	1007	1011

BAXPFC12 - Cond 1 Trial 2 Feet together eyes open

Variable Name:: BAXPFC12
SAS Label:: Cond 1 Trial 2 Feet together eyes open
English Text:: Feet together eyes open:
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	3	3	BAXPFC21
2	Dnp(did not pass)	1	4
.	Missing	1007	1011

BAXFTC12 - Cond 1 Trial 2 Failure Time(seconds)

Variable Name:: BAXFTC12
SAS Label:: Cond 1 Trial 2 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 14

Code or Value	Value Description	Count	Cumulative	Skip to Item
13	13	1	1
.	Missing	1010	1011

BAXPFC21 - Cond 2 Trial 1 Feet together eyes closed

Variable Name:: BAXPFC21
SAS Label:: Cond 2 Trial 1 Feet together eyes closed
English Text:: Feet together eyes closed:
English Instructions:: Stand in this position with your eyes closed, facing the target for as long as you can or until I ask you to stop. First assume this position with your eyes open, and then close your eyes. Please do not talk once the test begins. "Begin now."
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	820	820	BAXPFC31
2	Dnp(did not pass)	32	852
.	Missing	159	1011

BAXFTC21 - Cond 2 Trial 1 Failure Time(seconds)

Variable Name:: BAXFTC21
SAS Label:: Cond 2 Trial 1 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 14

Code or Value	Value Description	Count	Cumulative	Skip to Item
2 to 14	Range of Values	32	32
.	Missing	979	1011

BAXPFC22 - Cond 2 Trial 2 Feet together eyes closed

Variable Name:: BAXPFC22
SAS Label:: Cond 2 Trial 2 Feet together eyes closed
English Text:: Feet together eyes closed:
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	23	23	BAXPFC31
2	Dnp(did not pass)	9	32
.	Missing	979	1011

BAXFTC22 - Cond 2 Trial 2 Failure Time(seconds)

Variable Name:: BAXFTC22
SAS Label:: Cond 2 Trial 2 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 14

Code or Value	Value Description	Count	Cumulative	Skip to Item
3 to 10	Range of Values	9	9
.	Missing	1002	1011

BAXPFC31 - Cond 3 Trial 1 Foam Pad Eyes Open

Variable Name:: BAXPFC31
SAS Label:: Cond 3 Trial 1 Foam Pad Eyes Open
English Text:: Feet together eyes open:
English Instructions:: Stand in this position with your eyes open, looking at the target for as long as you can or until I ask you to stop. Please do not talk once the test begins. "Begin now."
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	824	824	BAXPFC41
2	Dnp(did not pass)	17	841
.	Missing	170	1011

BAXFTC31 - Cond 3 Trial 1 Failure Time(seconds)

Variable Name:: BAXFTC31
SAS Label:: Cond 3 Trial 1 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 29

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 28	Range of Values	17	17
.	Missing	994	1011

BAXPFC32 - Cond 3 Trial 2 Foam Pad Eyes Open

Variable Name:: BAXPFC32
SAS Label:: Cond 3 Trial 2 Foam Pad Eyes Open
English Text:: Feet together eyes open:
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	13	13	BAXPFC41
2	Dnp(did not pass)	4	17
.	Missing	994	1011

BAXFTC32 - Cond 3 Trial 2 Failure Time(seconds)

Variable Name:: BAXFTC32
SAS Label:: Cond 3 Trial 2 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 29

Code or Value	Value Description	Count	Cumulative	Skip to Item
0 to 27	Range of Values	4	4
.	Missing	1007	1011

BAXPFC41 - Cond 4 Trial 1 Foam Pad Eyes Closed

Variable Name:: BAXPFC41
SAS Label:: Cond 4 Trial 1 Foam Pad Eyes Closed
English Text:: Feet together eyes closed:
English Instructions:: Stand in this position with your eyes closed, facing the target for as long as you can or until I ask you to stop. First assume this position with your eyes open, and then close your eyes. Please do not talk once the test begins. "Begin now."
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	383	383	End of Section
2	Dnp(did not pass)	454	837
.	Missing	174	1011

BAXFTC41 - Cond 4 Trial 1 Failure Time(seconds)

Variable Name:: BAXFTC41
SAS Label:: Cond 4 Trial 1 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 29

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 29	Range of Values	454	454
.	Missing	557	1011

BAXPFC42 - Cond 4 Trial 2 Foam Pad Eyes Closed

Variable Name:: BAXPFC42
SAS Label:: Cond 4 Trial 2 Foam Pad Eyes Closed
English Text:: Feet together eyes closed:
Target:: Both males and females 40 YEARS - 69 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1	Pass	164	164	End of Section
2	Dnp(did not pass)	286	450
.	Missing	561	1011

BAXFTC42 - Cond 4 Trial 2 Failure Time(seconds)

Variable Name:: BAXFTC42
SAS Label:: Cond 4 Trial 2 Failure Time(seconds)
English Text:: Number of Seconds:
Target:: Both males and females 40 YEARS - 69 YEARS
Hard Edits:: 0 to 29

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 29	Range of Values	286	286
.	Missing	725	1011

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