Table 1.
Reproductive health characteristics of twin participants by self-reported ancestry.
| Variable | European ancestry (N = 244) | African ancestry (N = 88) | P value |
|---|---|---|---|
| Zygosity (%) | |||
| MZ | 168 (69) | 48 (55) | |
| DZ | 76 (31) | 40 (45) | 0.0224 |
| BMI | |||
| Minimum | 18.00 | 17.00 | |
| Median (IQR) | 25.10 (21.00, 31.02) | 30.90 (25.30, 36.00) | |
| Mean (sd) | 26.84 ± 6.74 | 30.95 ± 7.02 | 0 |
| Maximum | 50.00 | 49.00 | |
| Missing | 32/244 (13) | 11/88 (12) | |
| Age | |||
| Minimum | 19 | 18 | |
| Median (IQR) | 36.00 (29.00, 49.00) | 36.50 (29.00, 51.75) | |
| Mean (sd) | 39.58 ± 13.90 | 38.98 ± 13.40 | 0.7199 |
| Maximum | 78 | 65 | |
| Bacterial vaginosis (%) | |||
| No | 213 (89) | 65 (77) | |
| Yes | 19 (8) | 18 (21) | |
| Not sure | 6 (3) | 1 (1) | |
| Missing | 6/244 (2) | 4/88 (5) | 0.0021 |
| Pregnant status (%) | |||
| No | 231 (96) | 85 (97) | |
| Yes | 4 (2) | 1 (1) | |
| Not sure | 6 (2) | 2 (2) | |
| Missiing | 3/244 (1) | 0/88 (0) | 1 |
| Nulliparous (%) | |||
| No | 164 (69) | 62 (70) | |
| Yes | 75 (31) | 26 (30) | |
| Missing | 5/244 (2) | 0/88 (0) | 0.8543 |
| Hormone therapy (%) | |||
| No | 64 (78) | 34 (92) | |
| Yes | 18 (22) | 3 (8) | |
| Missing | 162/244 (66) | 51/88 (58) | 0.1155 |
| Hormonal birth control (%) | |||
| No | 162 (75) | 61 (77) | |
| Yes | 54 (25) | 18 (23) | |
| Missing | 28/244 (11) | 9/88 (10) | 0.811 |
| Sample pH (%) | |||
| Minimum | 4.00 | 4.00 | |
| Median (IQR) | 4.50 (4.00, 5.50) | 4.70 (4.40, 5.50) | |
| Mean (sd) | 5.02 ± 1.13 | 5.08 ± 1.03 | 0.6369 |
| Maximum | 7.00 | 7.00 | |
| Missinig | 4/244 (2) | 0/88 (0) | |
| Current smoking (%) | |||
| No | 142 (67) | 64 (83) | |
| Yes | 71 (33) | 13 (17) | |
| Missing | 31/244 (13) | 11/88 (12) | 0.0099 |