Table 1 Baseline characteristics of the study population
Variable | Total (N = 3613) | infertility | ||
|---|---|---|---|---|
No (N = 3125) | Yes(N = 488) | P | ||
Age (years) | 32.80 ± 7.55 | 32.48 ± 7.59 | 34.89 ± 6.88 | < 0.001 |
PIR | 2.35 ± 1.61 | 2.31 ± 1.60 | 2.61 ± 1.66 | < 0.001 |
BMI(kg/m²) | 29.79 ± 8.35 | 29.48 ± 8.20 | 31.79 ± 8.99 | < 0.001 |
Race | 0.258 | |||
Mexican American | 594 (16.44%) | 518 (16.58%) | 76 (15.57%) | |
Non-Hispanic White | 1188 (32.88%) | 1009 (32.29%) | 179 (36.68%) | |
Non-Hispanic Black | 831 (23.00%) | 721 (23.07%) | 110 (22.54%) | |
Other Race | 1000 (27.68%) | 877 (28.06%) | 123 (25.20%) | |
Marital status | < 0.001 | |||
Married/Living with partner | 2071 (57.32%) | 1721 (55.07%) | 350 (71.72%) | |
Separated/Widowed/Divorced | 392 (10.85%) | 337 (10.78%) | 55 (11.27%) | |
Never married | 1150 (31.83%) | 1067 (34.14%) | 83 (17.01%) | |
Education level | 0.850 | |||
Less than High school | 563 (15.58%) | 491 (15.71%) | 72 (14.75%) | |
High school or equivalent | 692 (19.15%) | 599 (19.17%) | 93 (19.06%) | |
College or above | 2358 (65.26%) | 2035 (65.12%) | 323 (66.19%) | |
Smoking status | 0.013 | |||
Never smoked | 2542 (70.40%) | 2226 (71.28%) | 316 (64.75%) | |
Current smoker | 656 (18.17%) | 551 (17.64%) | 105 (21.52%) | |
Former smoker | 413 (11.44%) | 346 (11.08%) | 67 (13.73%) | |
Regular menstruation in past 12 months | 0.687 | |||
Yes | 3232 (89.45%) | 2798 (89.54%) | 434 (88.93%) | |
No | 381 (10.55%) | 327 (10.46%) | 54 (11.07%) | |
Hypertension | < 0.001 | |||
Yes | 555 (15.37%) | 451 (14.44%) | 104 (21.31%) | |
No | 3056 (84.63%) | 2672 (85.56%) | 384 (78.69%) | |
Diabetes | < 0.001 | |||
Yes | 167 (4.62%) | 125 (4.00%) | 42 (8.61%) | |
No | 3444 (95.38%) | 2998 (96.00%) | 446 (91.39%) | |