Table 1 Baseline Characteristics of All Participants According to PIR in Our Study
From: Age affects the association between socioeconomic status and infertility: a cross-sectional study
Covariates | Total (n = 3,273) | PIR<2 (n = 1,654) | PIR ≥ 2 (n = 1,619) | P-value |
|---|---|---|---|---|
Age, mean ± SD (years) | 34.6 ± 8.8 | 33.9 ± 8.8 | 35.3 ± 8.7 | < 0.001 |
Race/Ethnicity, n (%) |  |  |  | < 0.001 |
Mexican American | 534 (16.3) | 369 (22.3) | 165 (10.2) | Â |
Other Hispanic | 320 ( 9.8) | 174 (10.5) | 146 (9) | Â |
Non-Hispanic White | 1125 (34.4) | 482 (29.1) | 643 (39.7) | Â |
Non-Hispanic Black | 706 (21.6) | 418 (25.3) | 288 (17.8) | Â |
Other Race | 588 (18.0) | 211 (12.8) | 377 (23.3) | Â |
Marital status, n (%) |  |  |  | < 0.001 |
Married or Living with partner | 1918 (58.6) | 847 (51.2) | 1071 (66.2) | Â |
Live alone | 1354 (41.4) | 806 (48.8) | 548 (33.8) | Â |
Education, n (%) |  |  |  | < 0.001 |
Less than high school | 484 (14.8) | 407 (24.6) | 77 (4.8) | Â |
High school | 636 (19.4) | 438 (26.5) | 198 (12.2) | Â |
More than high school | 2151 (65.8) | 807 (48.8) | 1344 (83) | Â |
Health insurance, n (%) |  |  |  | < 0.001 |
No | 712 (21.8) | 569 (34.4) | 143 (8.8) | Â |
Yes | 2558 (78.2) | 1083 (65.6) | 1475 (91.2) | Â |
Ever been pregnant, n (%) |  |  |  | < 0.001 |
No | 821 (25.1) | 299 (18.1) | 522 (32.3) | Â |
Yes | 2451 (74.9) | 1355 (81.9) | 1096 (67.7) | Â |
BMI (kg/m2),Mean ± SD | 29.8 ± 8.5 | 30.8 ± 8.8 | 28.9 ± 8.1 | < 0.001 |
General health condition, n (%) |  |  |  | < 0.001 |
Excellent | 305 ( 9.3) | 122 (7.4) | 183 (11.3) | Â |
Very good | 957 (29.2) | 321 (19.4) | 636 (39.3) | Â |
Good | 1339 (40.9) | 727 (44) | 612 (37.8) | Â |
Fair | 593 (18.1) | 422 (25.5) | 171 (10.6) | Â |
Poor | 79 ( 2.4) | 62 (3.7) | 17 (1.1) | Â |
Smoking, n (%) |  |  |  | < 0.001 |
No | 2290 (70.0) | 1071 (64.8) | 1219 (75.3) | Â |
Yes | 981 (30.0) | 581 (35.2) | 400 (24.7) | Â |
Pelvic inflammatory disease, n (%) |  |  |  | < 0.001 |
No | 3090 (95.0) | 1538 (93.6) | 1552 (96.4) | Â |
Yes | 163 ( 5.0) | 105 (6.4) | 58 (3.6) | Â |
Diabetes Mellitus, n (%) | Â | Â | Â | 0.007 |
No | 3110 (95.0) | 1555 (94) | 1555 (96.1) | Â |
Yes | 162 ( 5.0) | 99 (6) | 63 (3.9) | Â |
Hypertension, n (%) |  |  |  | < 0.001 |
No | 2731 (83.5) | 1341 (81.2) | 1390 (85.9) | Â |
Yes | 540 (16.5) | 311 (18.8) | 229 (14.1) | Â |
Coronary heart disease, n (%) | Â | Â | Â | 0.125 |
No | 3266 (99.8) | 1648 (99.6) | 1618 (99.9) | Â |
Yes | 7 ( 0.2) | 6 (0.4) | 1 (0.1) | Â |
Cancer/Malignancy, n (%) | Â | Â | Â | 0.614 |
No | 3174 (97.0) | 1601 (96.8) | 1573 (97.2) | Â |
Yes | 99 ( 3.0) | 53 (3.2) | 46 (2.8) | Â |
Stroke, n (%) | Â | Â | Â | 0.081 |
No | 3240 (99.1) | 1632 (98.7) | 1608 (99.4) | Â |
Yes | 31 ( 0.9) | 21 (1.3) | 10 (0.6) | Â |
Vigorous recreational activities, n (%) |  |  |  | < 0.001 |
No | 2304 (70.4) | 1301 (78.7) | 1003 (62) | Â |
Yes | 969 (29.6) | 353 (21.3) | 616 (38) | Â |
Moderate recreational activities, n (%) |  |  |  | < 0.001 |
No | 1768 (54.0) | 1041 (62.9) | 727 (44.9) | Â |
Yes | 1505 (46.0) | 613 (37.1) | 892 (55.1) | Â |
Infertility, n (%) | Â | Â | Â | 0.031 |
0 | 2874 (87.8) | 1473 (89.1) | 1401 (86.5) | Â |
1 | 399 (12.2) | 181 (10.9) | 218 (13.5) | Â |