Table 3.
Exploratory factors associated with average biomarker levels of 25-hydroxyvitamin D3 and folate.
| Factorsa | n | Mean (min-max) | Group | n | 25-hydroxyvitamin D3 (ng/ml) |
Folateb (nmol/L) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | Median | 25th percentile | 75th percentile | Mean | Median | 25th percentile | 75th percentile | |||||
| Age | 125 | 44 (8–88) |
<19 | 14 | 9.4 | 7.8 | 5.6 | 11.9 | 16.4 | 12.8 | 10.6 | 20.5 |
| 19–30 | 21 | 8.7 | 9.2 | 5.2 | 10.8 | 18.4 | 17.6 | 10.4 | 25.9 | |||
| 31–51 | 42 | 8.9 | 7.6 | 6.0 | 11.5 | 18.7 | 17.7 | 12.0 | 22.9 | |||
| >51 | 48 | 11.1 | 9.8 | 6.8 | 15.5 | 15.7 | 13.5 | 11.0 | 18.1 | |||
| Sex | 128 | F | 64 | 8.7 | 7.5 | 5.4 | 11.3 | 18.1 | 16.5 | 10.7 | 23.2 | |
| M | 64 | 11.1 | 9.6 | 6.9 | 13.5 | 16.6 | 14.0 | 11.5 | 21.5 | |||
| BMI | 108 | 25.8 (16.9–46.4) |
≤25 | 55 | 9.0 | 7.5 | 5.2 | 11.4 | 16.4 | 14.7 | 10.7 | 22.0 |
| >25 | 53 | 10.4 | 9.4 | 6.9 | 12.9 | 18.0 | 14.2 | 11.1 | 23.2 | |||
| Smoking in the previous 24 h | 128 | Yes | 64 | 8.4 | 7.3 | 5.4 | 10.7 | 16.5 | 13.1 | 10.7 | 22.7 | |
| No | 64 | 11.3 | 10.3 | 7.2 | 14.3 | 18.2 | 17.1 | 11.9 | 22.1 | |||
| Alcohol in the previous 24 h | 128 | Yes | 18 | 8.8 | 7.6 | 5.4 | 12.0 | 18.8 | 16.3 | 12.8 | 23.0 | |
| No | 110 | 10.1 | 9.2 | 6.2 | 12.7 | 17.1 | 14.3 | 10.9 | 22.4 | |||
aFrom the general demographics survey, used in the biomonitoring project [11].
bSum of 5-Methyl THF, THF, 5,10-Methenyl THF, Folic Acid, 5-Formyl THF