Table of Contents

Component Description

To reduce the risk of inadvertent disclosure, all data from this 1-year urine collection can only be accessed through the NCHS Research Data Center (RDC). Instructions for requesting use of these data are available at the RDC website.

As part of their physical examination, NHANES participants aged 6 and over were asked to provide a full void of urine in the mobile examination center (MEC). The urine specimen collected in the MEC were used to perform various laboratory tests and to aliquot and bank for future studies. In 2014, a random half sample of non-pregnant participants aged 20-69 years examined in the MEC were asked to collect their urines for a 24-hour period. For those who completed the 24-hour urine collection, we also analyzed urine electrolytes (sodium, potassium, and chloride) and creatinine in their stored urine samples from the MEC. The MEC urine sample was measured to examine the utility of spot urine specimens in estimating 24-hour electrolyte excretions at the population level.

Urine electrolytes sodium, potassium and chloride are principally used as nutritional indicators in healthy persons. They are infrequently measured in clinical settings, however. Measured electrolyte values are not diagnostic of any disease, but can be used in special situations to help support the diagnosis of several rare clinical conditions. The more important use of urinary electrolyte data is for public health studies. Urine sodium data is an important biomarker of dietary sodium intake.

To reduce the risk of inadvertent disclosure, all data from this 1-year urine collection can only be accessed through the NCHS Research Data Center (RDC). Instructions for requesting use of these data are available at the RDC website.

Eligible Sample

A random one-half sample of all examined participants aged 20-69 years, except a few eliminated based on exclusion criteria such as pregnancy, were asked to collect a 24-hour urine specimen. Those who completed the 24-hour urine collection were eligible for the MEC urine electrolyte analyses.

Description of Laboratory Methodology

An Ion-Selective Electrode (lSE) makes use of the unique properties of certain membrane materials to develop an electrical potential (electromotive force, EMF) for the measurements of ions in solution. The complete measurement system for a particular ion includes the lSE, a reference electrode, and electronic circuits to measure and process the EMF to give the test ion concentration. The type of ISE used on the Hitachi ISE Module(s) is classified as liquid/liquid junction type. The sodium and potassium electrodes are based on neutral carriers and the chloride electrode is based on an ion exchanger. For determinations on the ISE Module(s), the sample is diluted 1:31 and a single L5 µL sample is taken for the three assays.

Refer to the Laboratory Method Files section for detailed laboratory procedure manual(s) of the methods used.

Laboratory Method Files

Laboratory Quality Assurance and Monitoring

Urine specimens were processed, stored, and shipped to Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA for analysis.

Detailed instructions on specimen collection and processing are discussed in the NHANES Laboratory Procedures Manual (LPM). Vials are stored under appropriate frozen (-30°C) conditions until they are shipped to National Center for Environmental Health, for testing.

The NHANES quality assurance and quality control (QA/QC) protocols meet the 1988 Clinical Laboratory Improvement Act mandates. Detailed QA/QC instructions are discussed in the NHANES Laboratory Procedures Manual (LPM).

Mobile Examination Centers (MECs)

Laboratory team performance is monitored using several techniques. NCHS and contract consultants use a structured quality assurance evaluation during unscheduled visits to evaluate both the quality of the laboratory work and the quality-control procedures. Each laboratory staff member is observed for equipment operation, specimen collection and preparation; testing procedures and constructive feedback are given to each staff member. Formal retraining sessions are conducted annually to ensure that required skill levels were maintained.

Analytical Laboratories

NHANES uses several methods to monitor the quality of the analyses performed by the contract laboratories. In the MEC, these methods include performing blind split samples collected on “dry run” sessions. In addition, contract laboratories randomly perform repeat testing on 2% of all specimens.

NCHS developed and distributed a quality control protocol for all the contract laboratories which outlined the use of Westgard rules (Westgard et al., 1981) when running NHANES specimens. Progress reports containing any problems encountered during shipping or receipt of specimens, summary statistics for each control pool, QC graphs, instrument calibration, reagents, and any special considerations are submitted to NCHS quarterly. The reports are reviewed for trends or shifts in the data. The laboratories are required to explain any identified areas of concern.

All QC procedures recommended by the manufacturers were followed. Reported results for all assays meet the CDC/NCEH Nutritional Biomarkers Branch quality control and quality assurance performance criteria for accuracy and precision, similar to the Westgard rules (Caudill et al., 2008).

Data Processing and Editing

Laboratory electrolyte data were analyzed and reported in mmol/L. The data were converted from mmol/L to mg/dL using the following formulas:

SSUNA = SSUNASI * 2.3

SSUK = SSUKSI * 3.9

SSUCL = SSUCLSI * 3.55

The data were reviewed. Incomplete data or improbable values were sent to the performing laboratory for confirmation.

Analytic Notes

Refer to the 2013 - 2014 Laboratory Data Overview  for general information on NHANES laboratory data.

Subsample weights

Sodium, potassium, and chloride were measured in a random one-half subsample of participants, aged 20 to 69 years, who were compliant in a 24-hour urine sample collection. Special sample weights are required to analyze these data properly. Specific sample weights for this subsample are included in this data file and should be used when analyzing these data.

Demographic and Other Related Variables

The analysis of NHANES laboratory data must be conducted using the appropriate survey design and demographic variables. The NHANES 2013-2014 Demographics File contains demographic data, health indicators, and other related information collected during household interviews.

This laboratory data file can be linked to the other NHANES data files using the unique survey participant identifier (i.e., SEQN).

Detection Limits

The detection limits were constant for all of the analytes in the data set. Two variables are provided for each of these analytes. The variable name ending in “1LC” (ex., SSUNA1LC) indicates whether the result was below the limit of detection: the value “0” means that the result was at or above the limit of detection, “1” indicates that the result was below the limit of detection. For analytes with analytic results below the lower limit of detection (ex., SSUNA1LC=1), an imputed fill value was placed in the analyte results field. This value is the lower limit of detection divided by the square root of 2 (LLOD/sqrt[2]). The other variable prefixed UR1 (ex., SSUNASI) provides the analytic result for that analyte.

The lower limit of detection (LLOD) for Electrolytes – MEC Urine Collection:

Variable  SAS Label LLOD 
SSUNASI   Sodium, Urine MEC Collection (mmol/L)  20
SSUKSI  Potassium, Urine MEC Collection (mmol/L)  3
SSUCLSI  Chloride, Urine MEC Collection (mmol/L)  20

Please refer to the NHANES Analytic Guidelines and the on-line NHANES Tutorial for further details on the use of sample weights and other analytic issues.

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

SSUNASI - Sodium, Urine (mmol/L)

Variable Name:
SSUNASI
SAS Label:
Sodium, Urine (mmol/L)
English Text:
Sodium, Urine (mmol/L)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
14 to 312 Range of Values 718 718
. Missing 1 719

SSUNA - Sodium, Urine (mg/dL)

Variable Name:
SSUNA
SAS Label:
Sodium, Urine (mg/dL)
English Text:
Sodium, Urine (mg/dL)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
32 to 718 Range of Values 718 718
. Missing 1 719

SSDUNALC - Sodium, Urine Comment Code

Variable Name:
SSDUNALC
SAS Label:
Sodium, Urine Comment Code
English Text:
Sodium, Urine Comment Code
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above detection limit 702 702
1 Below lower detection limit 16 718
. Missing 1 719

SSUKSI - Potassium, Urine (mmol/L)

Variable Name:
SSUKSI
SAS Label:
Potassium, Urine (mmol/L)
English Text:
Potassium, Urine (mmol/L)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 to 169.54 Range of Values 718 718
. Missing 1 719

SSUK - Potassium, Urine (mg/dL)

Variable Name:
SSUK
SAS Label:
Potassium, Urine (mg/dL)
English Text:
Potassium, Urine (mg/dL)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8 to 661 Range of Values 718 718
. Missing 1 719

SSDUKLC - Potassium, Urine Comment Code

Variable Name:
SSDUKLC
SAS Label:
Potassium, Urine Comment Code
English Text:
Potassium, Urine Comment Code
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above detection limit 717 717
1 Below lower detection limit 1 718
. Missing 1 719

SSUCLSI - Chloride, Urine (mmol/L)

Variable Name:
SSUCLSI
SAS Label:
Chloride, Urine (mmol/L)
English Text:
Chloride, Urine (mmol/L)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
14 to 286 Range of Values 718 718
. Missing 1 719

SSUCL - Chloride, Urine (mg/dL)

Variable Name:
SSUCL
SAS Label:
Chloride, Urine (mg/dL)
English Text:
Chloride, Urine (mg/dL)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
50 to 1015 Range of Values 718 718
. Missing 1 719

SSDUCLLC - Chloride, Urine Comment Code

Variable Name:
SSDUCLLC
SAS Label:
Chloride, Urine Comment Code
English Text:
Chloride, Urine Comment Code
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above detection limit 697 697
1 Below lower detection limit 21 718
. Missing 1 719

VPSU - Variance PSU

Variable Name:
VPSU
SAS Label:
Variance PSU
English Text:
Variance primary sampling unit (PSU)
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 15 Range of Values 719 719
. Missing 0 719

VSTRA - Variance stratum

Variable Name:
VSTRA
SAS Label:
Variance stratum
English Text:
Variance stratum
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 1 719 719
. Missing 0 719

WT1YUR - 1 year urine weight

Variable Name:
WT1YUR
SAS Label:
1 year urine weight
English Text:
1 year urine weight
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
26626.969653 to 962263.82549 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUR01 - 1 year urine weight - Jackknife 01

Variable Name:
WT1YUR01
SAS Label:
1 year urine weight - Jackknife 01
English Text:
1 year urine weight: Jackknife replicate weight 01
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
32988.435668 to 1003989.6307 Range of Values 675 675
0 Not in replicate sample or no complete urine collection 44 719
. Missing 0 719

WT1YUR02 - 1 year urine weight - Jackknife 02

Variable Name:
WT1YUR02
SAS Label:
1 year urine weight - Jackknife 02
English Text:
1 year urine weight: Jackknife replicate weight 02
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
30811.629073 to 1032370.6822 Range of Values 656 656
0 Not in replicate sample or no complete urine collection 63 719
. Missing 0 719

WT1YUR03 - 1 year urine weight - Jackknife 03

Variable Name:
WT1YUR03
SAS Label:
1 year urine weight - Jackknife 03
English Text:
1 year urine weight: Jackknife replicate weight 03
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
32444.744583 to 1124054.7132 Range of Values 657 657
0 Not in replicate sample or no complete urine collection 62 719
. Missing 0 719

WT1YUR04 - 1 year urine weight - Jackknife 04

Variable Name:
WT1YUR04
SAS Label:
1 year urine weight - Jackknife 04
English Text:
1 year urine weight: Jackknife replicate weight 04
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
30122.038208 to 996811.1017 Range of Values 648 648
0 Not in replicate sample or no complete urine collection 71 719
. Missing 0 719

WT1YUR05 - 1 year urine weight - Jackknife 05

Variable Name:
WT1YUR05
SAS Label:
1 year urine weight - Jackknife 05
English Text:
1 year urine weight: Jackknife replicate weight 05
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
26595.342712 to 1180891.0718 Range of Values 660 660
0 Not in replicate sample or no complete urine collection 59 719
. Missing 0 719

WT1YUR06 - 1 year urine weight - Jackknife 06

Variable Name:
WT1YUR06
SAS Label:
1 year urine weight - Jackknife 06
English Text:
1 year urine weight: Jackknife replicate weight 06
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
25525.240772 to 1069430.0221 Range of Values 679 679
0 Not in replicate sample or no complete urine collection 40 719
. Missing 0 719

WT1YUR07 - 1 year urine weight - Jackknife 07

Variable Name:
WT1YUR07
SAS Label:
1 year urine weight - Jackknife 07
English Text:
1 year urine weight: Jackknife replicate weight 07
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
29254.953947 to 1238634.2445 Range of Values 659 659
0 Not in replicate sample or no complete urine collection 60 719
. Missing 0 719

WT1YUR08 - 1 year urine weight - Jackknife 08

Variable Name:
WT1YUR08
SAS Label:
1 year urine weight - Jackknife 08
English Text:
1 year urine weight: Jackknife replicate weight 08
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
27922.235179 to 994400.70164 Range of Values 681 681
0 Not in replicate sample or no complete urine collection 38 719
. Missing 0 719

WT1YUR09 - 1 year urine weight - Jackknife 09

Variable Name:
WT1YUR09
SAS Label:
1 year urine weight - Jackknife 09
English Text:
1 year urine weight: Jackknife replicate weight 09
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
27354.825857 to 1046225.3276 Range of Values 681 681
0 Not in replicate sample or no complete urine collection 38 719
. Missing 0 719

WT1YUR10 - 1 year urine weight - Jackknife 10

Variable Name:
WT1YUR10
SAS Label:
1 year urine weight - Jackknife 10
English Text:
1 year urine weight: Jackknife replicate weight 10
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
26787.826959 to 995943.49666 Range of Values 675 675
0 Not in replicate sample or no complete urine collection 44 719
. Missing 0 719

WT1YUR11 - 1 year urine weight - Jackknife 11

Variable Name:
WT1YUR11
SAS Label:
1 year urine weight - Jackknife 11
English Text:
1 year urine weight: Jackknife replicate weight 11
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
28902.632671 to 956789.383 Range of Values 688 688
0 Not in replicate sample or no complete urine collection 31 719
. Missing 0 719

WT1YUR12 - 1 year urine weight - Jackknife 12

Variable Name:
WT1YUR12
SAS Label:
1 year urine weight - Jackknife 12
English Text:
1 year urine weight: Jackknife replicate weight 12
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
28817.414878 to 1202268.6888 Range of Values 672 672
0 Not in replicate sample or no complete urine collection 47 719
. Missing 0 719

WT1YUR13 - 1 year urine weight - Jackknife 13

Variable Name:
WT1YUR13
SAS Label:
1 year urine weight - Jackknife 13
English Text:
1 year urine weight: Jackknife replicate weight 13
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
30806.914324 to 1016724.8442 Range of Values 676 676
0 Not in replicate sample or no complete urine collection 43 719
. Missing 0 719

WT1YUR14 - 1 year urine weight - Jackknife 14

Variable Name:
WT1YUR14
SAS Label:
1 year urine weight - Jackknife 14
English Text:
1 year urine weight: Jackknife replicate weight 14
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
28423.967242 to 1050505.08 Range of Values 665 665
0 Not in replicate sample or no complete urine collection 54 719
. Missing 0 719

WT1YUR15 - 1 year urine weight - Jackknife 15

Variable Name:
WT1YUR15
SAS Label:
1 year urine weight - Jackknife 15
English Text:
1 year urine weight: Jackknife replicate weight 15
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
29944.843186 to 966684.41773 Range of Values 694 694
0 Not in replicate sample or no complete urine collection 25 719
. Missing 0 719

WT1YUB01 - 1 year urine weight - Fay's BRR 01

Variable Name:
WT1YUB01
SAS Label:
1 year urine weight - Fay's BRR 01
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 01
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
9708.117363 to 1679130.4025 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB02 - 1 year urine weight - Fay's BRR 02

Variable Name:
WT1YUB02
SAS Label:
1 year urine weight - Fay's BRR 02
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 02
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8349.837846 to 1606031.1301 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB03 - 1 year urine weight - Fay's BRR 03

Variable Name:
WT1YUB03
SAS Label:
1 year urine weight - Fay's BRR 03
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 03
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
9901.051122 to 1842177.1645 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB04 - 1 year urine weight - Fay's BRR 04

Variable Name:
WT1YUB04
SAS Label:
1 year urine weight - Fay's BRR 04
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 04
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
7565.591177 to 1574920.7297 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB05 - 1 year urine weight - Fay's BRR 05

Variable Name:
WT1YUB05
SAS Label:
1 year urine weight - Fay's BRR 05
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 05
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8593.837633 to 1729983.0084 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB06 - 1 year urine weight - Fay's BRR 06

Variable Name:
WT1YUB06
SAS Label:
1 year urine weight - Fay's BRR 06
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 06
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
7080.034439 to 1547547.9405 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB07 - 1 year urine weight - Fay's BRR 07

Variable Name:
WT1YUB07
SAS Label:
1 year urine weight - Fay's BRR 07
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 07
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
9349.310683 to 1637477.4953 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB08 - 1 year urine weight - Fay's BRR 08

Variable Name:
WT1YUB08
SAS Label:
1 year urine weight - Fay's BRR 08
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 08
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8094.557196 to 1663257.4171 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB09 - 1 year urine weight - Fay's BRR 09

Variable Name:
WT1YUB09
SAS Label:
1 year urine weight - Fay's BRR 09
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 09
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
9247.466513 to 1528171.3752 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB10 - 1 year urine weight - Fay's BRR 10

Variable Name:
WT1YUB10
SAS Label:
1 year urine weight - Fay's BRR 10
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 10
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
7819.636741 to 1625507.9938 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB11 - 1 year urine weight - Fay's BRR 11

Variable Name:
WT1YUB11
SAS Label:
1 year urine weight - Fay's BRR 11
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 11
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
10596.04009 to 1661523.21 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB12 - 1 year urine weight - Fay's BRR 12

Variable Name:
WT1YUB12
SAS Label:
1 year urine weight - Fay's BRR 12
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 12
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
9613.933744 to 1573065.1352 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB13 - 1 year urine weight - Fay's BRR 13

Variable Name:
WT1YUB13
SAS Label:
1 year urine weight - Fay's BRR 13
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 13
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
9982.528076 to 1491089.5334 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB14 - 1 year urine weight - Fay's BRR 14

Variable Name:
WT1YUB14
SAS Label:
1 year urine weight - Fay's BRR 14
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 14
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8619.090806 to 1762735.6368 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB15 - 1 year urine weight - Fay's BRR 15

Variable Name:
WT1YUB15
SAS Label:
1 year urine weight - Fay's BRR 15
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 15
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12595.358001 to 1515996.8049 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719

WT1YUB16 - 1 year urine weight - Fay's BRR 16

Variable Name:
WT1YUB16
SAS Label:
1 year urine weight - Fay's BRR 16
English Text:
1 year urine weight: Fay’s-adjusted balanced repeated replication (Fay’s BRR) weight 16
Target:
Both males and females 20 YEARS - 69 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8365.095245 to 1734825.4197 Range of Values 719 719
0 No complete urine collection 0 719
. Missing 0 719