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Selected characteristics of the 297 study participants
| Characteristics | Total | |
|---|---|---|
| n | % | |
| Mean age and range, years | 35 (19–75) | |
| Smoker | ||
| Yes | 94 | 32 |
| No | 203 | 68 |
| Parity | ||
| 0 | 103 | 35 |
| 1–2 | 138 | 46 |
| 3–6 | 56 | 19 |
| Lifetime number of sexual partners | ||
| 1 | 20 | 7 |
| 2–4 | 70 | 24 |
| 5–10 | 106 | 36 |
| >10 | 100 | 34 |
