This proposed calibration study is designed to evaluate the correlation of urinary sodium excretion between NHANES timed urine and 24-hour urine collections.
The study will be conducted with 400 volunteer participants aged 18-39 years old. Participants will be asked to collect urine samples over a 24-hour period. One-third of the participants (n=133) will be asked to collect a second 24-hour urine 4-11 days later. A 24-hour dietary recall interview will be collected after the completion of each 24-hour urine collection. Results from this study will be used to assess how well the sodium excretion estimated from NHANES timed urine correlates with data from 24-hour urine collection. It will provide valuable information on the potential of NHANES timed urine collections to be used to characterize trends in U.S. population sodium intake.
Study Type
OBSERVATIONAL
Enrollment
441
Usual sodium intake
Usual sodium intake based on 24-hour sodium excretions (two measurements for a one-third subset 4-11 days after the first collection) using measurement error models
Time frame: one day
Usual potassium intake
Usual potassium intake based on 24-hour potassium excretions (two measurements for a one-third subset) using measurement error models
Time frame: one day
Creatinine excretion
Based on 24-hour creatinine excretion
Time frame: one day
Usual iodine intake
Usual sodium intake based on 24-hour sodium excretions (two measurements for a one-third subset 4-11 days after the first collection) using measurement error models
Time frame: one day
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