Table 2.
Association between serum 25(OH)D concentrations and markers of lung function in US adults (n = 11,983): National Health and Nutrition Examination Surveys 2007–2012 (mean ± SE).
| Serum 25(OH)D quartiles | P-value | ||||
|---|---|---|---|---|---|
| Q1 (n = 2,995 ) | Q2 (n = 2,996) | Q3 (n = 2,996) | Q4 (n = 2,996) | ||
| FVC, mL | |||||
| Unadjusted | 3,000 ± 20a | 3,300 ± 120b | 3,310 ± 30b | 3,180 ± 30b | 0.005 |
| Multivariate-adjusted | 3,110 ± 20a | 3,200 ± 180b | 3,240 ± 20b, c | 3,260 ± 20c | < 0.001 |
| FEV1, mL | |||||
| Unadjusted | 3,800 ± 30a | 4,180 ± 130b | 4,260 ± 30b | 4,150 ± 30c | < 0.001 |
| Multivariate-adjusted | 4,010 ± 20a | 4,090 ± 190b | 4,140 ± 20b | 4,190 ± 20b | < 0.001 |
Means not sharing common superscripts are significantly different from each other within the row. Multivatiate analysis was adjusted for gender, age, race-ethnicity, sedentary activity, PIR, smoking status, alcohol intake, vitamin D supplements intake, season of examination, and BMI.