Table 1. Baseline characteristics of the 63,210 women with polycystic ovary syndrome (PCOS) and 121,064 control women without PCOS.
| Characteristics | PCOS | Controls |
|---|---|---|
| Age mean (SD) | 30.6 (7.1) | 30.8 (7.1) |
| Townsend score# n (%) | ||
| 1 | 12,410 (19.6) | 23,540 (19.4) |
| 2 | 11,224 (17.8) | 21,126 (17.4) |
| 3 | 13,238 (20.9) | 25,629 (21.3) |
| 4 | 12,634 (20.0) | 24,930 (20.6) |
| 5 | 8,737 (13.8) | 17,596 (14.5) |
| Missing data | 4,967 (7.9) | 8,243 (6.8) |
| BMI (kg/m2) categories n (%) | ||
| <25 | 21,689 (34.3) | 44,742 (37.0) |
| 25–30 | 12,412 (19.6) | 24,656 (20.4) |
| >30 | 19,499 (30.8) | 32,627 (27.0) |
| Missing or implausible data | 9,610 (15.2) | 19,039 (15.7) |
| Smoking status n (%) | ||
| Nonsmokers | 46,133 (73.0) | 88,519 (73.1) |
| Smokers | 14,191 (22.4) | 29,272 (24.2) |
| Missing or implausible data | 2,886 4.6) | 3,273 2.7) |
| Medical conditions at baseline n (%) | ||
| Diabetes | 1,378 (2.2) | 1,693 (1.4) |
| Hypertension | 1,953 (3.1) | 2,839 (2.4) |
| Hypothyroidism | 2,462 (3.9) | 3,009 (2.5) |
| IGR* | 348 (0.6) | 384 (0.3) |
#Townsend score of social deprivation: presented as quintiles with 1 as the least deprived and 5 as the most deprived.
*IGR, impaired glucose regulation (includes impaired fasting glucose [IFG; defined as fasting plasma glucose 6.1–6.9 mmol/L] and impaired glucose tolerance [IGT; defined as plasma glucose 7.8–11.1 mmol/L measured 120 minutes after ingestion of 75 g glucose in the oral glucose tolerance test]).