NHANES 2017-2018
National Health and Nutrition Examination Survey 2017-2018 Cycle (J) (2017–2018)
NHANES 2017-2018 overview: https://wwwn.cdc.gov/nchs/nhanes/continuousnhanes/overview.aspx?Cycle=2017-2018
Vitamin D codebook (VID_J): https://wwwn.cdc.gov/Nchs/Data/Nhanes/Public/2017/DataFiles/VID_J.htm
Vitamins A, E, and Carotenoids codebook (VITAEC_J): https://wwwn.cdc.gov/Nchs/Data/Nhanes/Public/2017/DataFiles/VITAEC_J.htm
Vitamin C codebook (VIC_J): https://wwwn.cdc.gov/Nchs/Data/Nhanes/Public/2017/DataFiles/VIC_J.htm
Demographics codebook (DEMO_J): https://wwwn.cdc.gov/Nchs/Data/Nhanes/Public/2017/DataFiles/DEMO_J.htm
Population
US civilian non-institutionalized population, all ages
Study Type
Cross-sectional nationally representative survey
About This Dataset
Some vitamin assays are not published as combined 2017-March 2020 pre-pandemic files. For 25-hydroxyvitamin D, vitamin A (retinol), vitamin E (alpha-tocopherol), and vitamin C, LabNorms uses the NHANES 2017-2018 cycle alone (J-cycle files) with the cycle's published two-year MEC weight WTMEC2YR applied directly. These percentiles should not be treated as two-cycle pooled estimates; effective sample size is smaller and tail precision is correspondingly reduced compared with analytes pooled across cycles.
Limitations
- US population only (distributions may differ in other countries)
- Cross-sectional design cannot establish causal relationships
- Single-cycle estimates have wider effective tails than pooled-cycle estimates used for other LabNorms analytes
- Self-reported supplement use is not used to exclude participants because NHANES does not capture supplementation reliably enough for consistent exclusion
- 25-hydroxyvitamin D is the LC-MS/MS sum of D2 and D3, excluding the C3-epi-25(OH)D3 isomer
Used for
Panels
Demographic Slices
- Vitamin A (Retinol) - Females, Age 20-29
- Vitamin A (Retinol) - Females, Age 30-39
- Vitamin A (Retinol) - Females, Age 40-49
- Vitamin A (Retinol) - Females, Age 50-59
- Vitamin A (Retinol) - Females, Age 60-69
- Vitamin A (Retinol) - Females, Age 70+
- Vitamin A (Retinol) - Males, Age 20-29
- Vitamin A (Retinol) - Males, Age 30-39
- Vitamin A (Retinol) - Males, Age 40-49
- Vitamin A (Retinol) - Males, Age 50-59
- Vitamin A (Retinol) - Males, Age 60-69
- Vitamin A (Retinol) - Males, Age 70+
- Vitamin C - Females, Age 20-29
- Vitamin C - Females, Age 30-39
- Vitamin C - Females, Age 40-49
- Vitamin C - Females, Age 50-59
- Vitamin C - Females, Age 60-69
- Vitamin C - Females, Age 70+
- Vitamin C - Males, Age 20-29
- Vitamin C - Males, Age 30-39
- Vitamin C - Males, Age 40-49
- Vitamin C - Males, Age 50-59
- Vitamin C - Males, Age 60-69
- Vitamin C - Males, Age 70+
- 25-Hydroxyvitamin D - Females, Age 20-29
- 25-Hydroxyvitamin D - Females, Age 30-39
- 25-Hydroxyvitamin D - Females, Age 40-49
- 25-Hydroxyvitamin D - Females, Age 50-59
- 25-Hydroxyvitamin D - Females, Age 60-69
- 25-Hydroxyvitamin D - Females, Age 70+
- 25-Hydroxyvitamin D - Males, Age 20-29
- 25-Hydroxyvitamin D - Males, Age 30-39
- 25-Hydroxyvitamin D - Males, Age 40-49
- 25-Hydroxyvitamin D - Males, Age 50-59
- 25-Hydroxyvitamin D - Males, Age 60-69
- 25-Hydroxyvitamin D - Males, Age 70+
- Vitamin E (alpha-Tocopherol) - Females, Age 20-29
- Vitamin E (alpha-Tocopherol) - Females, Age 30-39
- Vitamin E (alpha-Tocopherol) - Females, Age 40-49
- Vitamin E (alpha-Tocopherol) - Females, Age 50-59
- Vitamin E (alpha-Tocopherol) - Females, Age 60-69
- Vitamin E (alpha-Tocopherol) - Females, Age 70+
- Vitamin E (alpha-Tocopherol) - Males, Age 20-29
- Vitamin E (alpha-Tocopherol) - Males, Age 30-39
- Vitamin E (alpha-Tocopherol) - Males, Age 40-49
- Vitamin E (alpha-Tocopherol) - Males, Age 50-59
- Vitamin E (alpha-Tocopherol) - Males, Age 60-69
- Vitamin E (alpha-Tocopherol) - Males, Age 70+