From: Prevalence of human papillomavirus cervical infection in an Italian asymptomatic population
N° |  | 503 |  |
Age | Mean (s.d.) | 51 (12.3) | Â |
 | Range | 20–81 |  |
Age at first intercourse | Mean (s.d.) | 20.8 (6.3) | Â |
 | Range | 5*-38 |  |
Marital status | Single | 123 | (24.45%) |
 | Married | 369 | (73.36%) |
 | Unknown | 11 | (2.19%) |
Education | High school or University | 207 | (41.1%) |
 | Middle School | 167 | (33.2%) |
 | Primary School | 120 | (23.8%) |
 | Unknown | 9 | (1.9%) |
History of pregnancy | 0 | 90 | (17.8%) |
 | 1–2 | 263 | (52.2%) |
 | ≥ 3 | 137 | (27.2%) |
 | n.a. | 13 | (2.5%) |
N° of lifetime partners | 1 | 294 | (58.45%) |
 | 2–4 | 74 | (14.71%) |
 | 5–9 | 33 | (6.56%) |
 | ≥ 10 | 47 | (9.34%) |
 | Unknown | 55 | (10.93%) |
History of sexually transmitted diseases | No | 479 | (95.2%) |
 | Yes | 24 | (4.8%) |
Smoking | No | 348 | (69.2%) |
 | Yes | 155 | (30.8%) |
Oral contraceptives | No | 337 | (67%) |
 | Yes/ex | 166 | (33%) |
History of abnormal Pap-smear | Â | 50/503 | (9.94%) |
SIL in the present Pap smear | Â | 3/503 | (0.6%) |