Table 1.
Percentiles for the exposure and outcome variables representing U.S. women and men.
| Variable | Percentile (±SE) | ||||
|---|---|---|---|---|---|
| 5th | 25th | 50th | 75th | 95th | |
| Serum folate (ng/mL) | |||||
| Women (n = 2933) | 5.7 ± 0.1 | 9.4 ± 0.1 | 13.1 ± 0.2 | 18.6 ± 0.3 | 31.1 ± 0.9 |
| Men (n = 2648) | 5.3 ± 0.2 | 8.5 ± 0.2 | 12.0 ± 0.2 | 16.1 ± 0.3 | 25.5 ± 0.7 |
| Combined (n = 5581) | 5.5 ± 0.1 | 9.0 ± 0.2 | 12.4 ± 0.2 | 17.5 ± 0.3 | 28.8 ± 0.7 |
| Serum vitamin B12 (pg/mL) | |||||
| Women (n = 2933) | 217.1 ± 5.2 | 335.7 ± 4.3 | 449.3 ± 5.8 | 598.8 ± 6.9 | 968.4 ± 27.7 |
| Men (n = 2648) | 235.5 ± 4.6 | 357.6 ± 6.1 | 452.6 ± 6.6 | 588.3 ± 6.9 | 840.0 ± 19.3 |
| Combined (n = 5581) | 225.8 ± 3.6 | 344.8 ± 3.0 | 451.4 ± 4.4 | 594.2 ± 5.8 | 894.6 ± 23.0 |
| Dietary folate (mcg) | |||||
| Women (n = 2928) | 113.6 ± 5.6 | 214.8 ± 5.6 | 311.9 ± 8.1 | 438.9 ± 8.3 | 745.7 ± 19.5 |
| Men (n = 2644) | 135.1 ± 8.0 | 261.2 ± 6.2 | 398.0 ± 11.4 | 573.9 ± 13.8 | 1039 ± 44.5 |
| Combined (n = 5572) | 121.8 ± 4.3 | 236.5 ± 5.3 | 349.7 ± 8.4 | 502.0 ± 11.7 | 889.3 ± 36.8 |
| Dietary vitamin B12 (mcg) | |||||
| Women (n = 2928) | 0.5 ± 0.0 | 1.7 ± 0.1 | 3.2 ± 0.1 | 5.4 ± 0.1 | 10.5 ± 0.5 |
| Men (n = 2644) | 1.0 ± 0.1 | 2.7 ± 0.1 | 4.7 ± 0.1 | 7.8 ± 0.3 | 15.2 ± 0.6 |
| Combined (n = 5572) | 0.7 ± 0.1 | 2.1 ± 0.1 | 3.9 ± 0.1 | 6.4 ± 0.2 | 13.2 ± 0.7 |
| Telomere length (base pairs) | |||||
| Women (n = 2933) | 4951 ± 38 | 5402 ± 38 | 5759 ± 40 | 6177 ± 55 | 7061 ± 136 |
| Men (n = 2648) | 4960 ± 32 | 5358 ± 28 | 5730 ± 33 | 6155 ± 47 | 6975 ± 97 |
| Combined (n = 5581) | 4958 ± 33 | 5385 ± 31 | 5745 ± 34 | 6171 ± 48 | 7022 ± 99 |
Note: SE: standard error. Table values include person-level weighted adjustments based on the sampling methods of NHANES so that values represent those of the U.S. adult population.