Table I.
Background characteristics of the total population (N = 88 892) including women with and without polycystic ovary syndrome (PCOS).
| Women with PCOS (n = 15 106) | Non-PCOS controls (n = 73 786) | P-value | |
|---|---|---|---|
| Obesity | <0.001 | ||
| No | 13 102 (86.7) | 71 302 (96.6) | |
| Yes | 2004 (13.3) | 2484 (3.4) | |
| Education | <0.001 | ||
| <12 years | 7701 (51.7) | 35 812 (49.6) | |
| 12 years | 7181 (48.3) | 36 368 (50.4) | |
| Missing data (1830, 2.1) | |||
| Country of Birth | <0.001 | ||
| Nordic countries | 11 500 (76.1) | 61 318 (83.1) | |
| Europe | 1087 (7.2) | 4526 (6.1) | |
| Middle East | 1425 (9.4) | 2872 (3.9) | |
| South Asia | 260 (1.7) | 540 (0.7) | |
| Africa | 263 (1.7) | 1706 (2.4) | |
| Remaining countries | 571 (3.8) | 2824 (3.8) | |
| Birth year | NS | ||
| 1987 | 2361 (15.6) | 11 401 (15.5) | |
| 1988 | 2210 (14.6) | 10 738 (14.6) | |
| 1989 | 2084 (13.8) | 10 153 (13.8) | |
| 1990 | 1951 (12.9) | 9523 (12.9) | |
| 1991 | 1704 (11.3) | 8304 (11.3) | |
| 1992 | 1408 (9.3) | 6936 (9.4) | |
| 1993 | 1141 (7.6) | 5642 (7.6) | |
| 1994 | 940 (6.2) | 4648 (6.3) | |
| 1995 | 760 (5.0) | 3745 (5.1) | |
| 1996 | 547 (3.6) | 2696 (3.7) | |
| First spontaneous childbirth | <0.001 | ||
| No | 12 961 (85.8) | 59 856 (81.1) | |
| Yes | 2145 (14.2) | 13 930 (18.9) |
Data are presented as n (%).