Table 1 Baseline characteristics of participants
Covariates | Total (n = 5,872) | Infertile (n = 649) | Fertile (n = 5,223) | P-value |
|---|---|---|---|---|
Age, years | 33.3 ± 9.4 | 36.2 ± 8.0 | 32.9 ± 9.5 | < 0.001 |
Age < 35 | 3,127 (53.3) | 259 (39.9) | 2,868 (54.9) | |
Age ≥ 35 | 2,745 (46.7) | 390 (60.1) | 2,355 (45.1) | |
Race/ethnicity | 0.058 | |||
Mexican American | 972 (16.6) | 88 (13.6) | 884 (16.9) | |
Other Hispanic | 602 (10.3) | 62 (9.6) | 540 (10.3) | |
Non-Hispanic white | 1,922 (32.7) | 246 (37.9) | 1,676 (32.1) | |
Non-Hispanic black | 1,350 (23.0) | 143 (22) | 1,207 (23.1) | |
Non-Hispanic asian | 718 (12.2) | 77 (11.9) | 641 (12.3) | |
Other race | 308 (5.2) | 33 (5.1) | 275 (5.3) | |
Education | 0.695 | |||
Less than high school | 1,875 (35.1) | 215 (33.8) | 1,660 (35.3) | |
High school | 1,989 (37.3) | 239 (37.5) | 1,750 (37.2) | |
More than high school | 1,474 (27.6) | 183 (28.7) | 1,291 (27.5) | |
Marital status | < 0.001 | |||
Live alone | 1,465 (41.3) | 118 (27.6) | 1,347 (43.2) | |
Married or cohabiting | 2,082 (58.7) | 309 (72.4) | 1,773 (56.8) | |
PIR | 2.3 ± 1.6 | 2.6 ± 1.6 | 2.3 ± 1.6 | < 0.001 |
Health insurance coverage | 0.989 | |||
Yes | 4,639 (79.1) | 512 (79) | 4,127 (79.1) | |
No | 1,225 (20.9) | 136 (21) | 1,089 (20.9) | |
Drinking | 0.003 | |||
Yes | 1,700 (62.4) | 224 (70) | 1,476 (61.3) | |
No | 1,026 (37.6) | 96 (30) | 930 (38.7) | |
Smoking | < 0.001 | |||
Yes | 1,672 (28.5) | 238 (36.7) | 1,434 (27.5) | |
No | 4,198 (71.5) | 411 (63.3) | 3,787 (72.5) | |
SUA, mg/dL | 4.5 ± 1.1 | 4.7 ± 1.1 | 4.5 ± 1.1 | < 0.001 |
Hyperuricemia | 0.026 | |||
Yes | 600 (10.2) | 83 (12.8) | 517 (9.9) | |
No | 5,272 (89.8) | 566 (87.2) | 4,706 (90.1) | |
BUN, mg/dL | 11.0 (9.0, 13.0) | 11.0 (9.0, 14.0) | 11.0 (9.0, 13.0) | 0.719 |
Cr, mg/dL | 0.7 (0.6, 0.8) | 0.7 (0.6, 0.8) | 0.7 (0.6, 0.8) | 0.473 |
eGFR, mL/min/1.73 m2 | 110.7 ± 16.7 | 108.5 ± 16.2 | 111.0 ± 16.8 | < 0.001 |
BMI, kg/m2 | 29.8 ± 8.5 | 32.0 ± 9.0 | 29.5 ± 8.4 | < 0.001 |
Obesity | < 0.001 | |||
Yes | 2,465 (42.4) | 352 (55) | 2,113 (40.8) | |
No | 3,352 (57.6) | 288 (45) | 3,064 (59.2) | |
Diabetes Mellitus | < 0.001 | |||
Yes | 295 (5.0) | 57 (8.8) | 238 (4.6) | |
No | 5,573 (95.0) | 592 (91.2) | 4,981 (95.4) | |
Hypertension | < 0.001 | |||
Yes | 950 (16.2) | 140 (21.6) | 810 (15.5) | |
No | 4,918 (83.8) | 509 (78.4) | 4,409 (84.5) | |
MetS | 0.012 | |||
Yes | 559 (9.5) | 80 (12.3) | 479 (9.2) | |
No | 5,313 (90.5) | 569 (87.7) | 4,744 (90.8) | |
Ever been pregnant | < 0.001 | |||
Ever | 4,063 (76.1) | 542 (85.2) | 3,521 (74.9) | |
Never | 1,276 (23.9) | 94 (14.8) | 1,182 (25.1) |