Supplementary Table 1.
The description of missing data.
| Variables | Without missing* | Missing |
|---|---|---|
| Age | 13475 | 0 |
| Race | 13475 | 0 |
| Education level | 12758 | 717 |
| Marital status | 13404 | 71 |
| BMI | 13367 | 108 |
| Poverty income ratio | 13190 | 285 |
| History of takingcontraceptives | 12855 | 620 |
| Female sex hormone user | 11546 | 1929 |
| Smoking more than 100 cigarettes in life | 13029 | 446 |
| Frequency of drinking in the past 12 months | 9813 | 3662 |
| Number of vaginal or anal sex in the past year | 7810 | 5665 |
| Number of sexual partners in the past year | 6231 | 7244 |
| Dietary vitamin B6 (mg) intake | 13453 | 22 |
| Dietary folate intake (mcg) | 13452 | 23 |
| Dietary vitamin B12 intake (mcg) | 13413 | 62 |
| Dietary vitamin C intake (mg) | 13398 | 77 |
| Serum vitamin D level (ng/mL) | 11543 | 1932 |
| Albumin-adjusted calcium | 13441 | 64 |
*
From the description of missing data, the number of missing data were mainly in sex behaviors.