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Table 2 Univariate cox proportional hazards regression analysis for incident HR-HPV among Women in the Costa Rican Vaccine Trial

From: A prospective study of absolute risk and determinants of human papillomavirus incidence among young women in Costa Rica

Woman characteristics Total Positive for one or more new HR-HPV types
  n Col % n % HR (95% CI)
Age at Enrollment (years) 18-20 1,729 46.4 864 50.0 1.1 (1.0 – 1.2)
21-25 2,002 53.6 947 47.3 Ref
Marital Status Divorced/Widowed 98 2.6 70 71.4 2.5 (1.9 – 3.1)
Single 2,082 56.0 1,084 52.1 1.4 (1.3 – 1.5)
Married or living as 1,544 41.4 654 42.4 Ref
Measures of SES All 5 3,012 80.7 1,517 50.4 1.3 (1.2 – 1.5)
<5 719 19.3 294 40.9 Ref
Virgin at Enrollment No 2,918 78.2 1,543 52.9 2.0 (1.7 – 2.2)
Yes 813 21.8 268 33.0 Ref
Years Sexually Active <1-2 674 23.1 393 58.3 1.4 (1.2 – 1.7)
3-4 812 27.9 430 53.0 1.2 (1.1 – 1.5)
5-7 890 30.6 461 51.8 1.1 (1.0 – 1.3)
>7 536 18.4 256 47.8 Ref
Monogamous Relationship No 2,489 66.7 1,253 50.3 1.2 (1.1 -1.4)
Yes 1,242 33.3 558 44.9 Ref
Number of Sex Partners 3+ 902 31.2 560 62.1 1.7 (1.5 – 1.9)
2 749 25.9 408 54.5 1.4 (1.2 – 1.6)
1 1,242 42.9 558 44.9 Ref
Duration Sexual Relationship with Partner (days) 1-330 1,051 36.3 608 57.9 1.5 (1.3 – 1.7)
331-1200 1,022 35.3 546 53.4 1.3 (1.2 – 1.5)
1201-4380 824 28.4 376 45.6 Ref
Lifetime Oral Contraceptive Use No 562 20.0 360 64.1 1.5 (1.3 – 1.7)
Yes 2,255 80.0 1,124 49.8 Ref
Lifetime Injectable Contraceptive Use No 1,685 59.8 911 54.1 1.2 (1.0 – 1.3)
Yes 1,133 40.2 571 50.4 Ref
Lifetime Condom Use Yes 1,729 61.3 933 54.0 1.2 (1.1 – 1.3)
No 1,092 38.7 550 50.4 Ref
Use of Barrier Methods During Sex Condom/Diaphragm 788 27.1 465 59.0 1.3 (1.2 – 1.4)
Neither 2,123 72.9 1,074 50.6 Ref
Smoked Cigarettes in Past 6 Months Yes 499 13.4 317 63.5 1.7 (1.5 – 1.9)
No 3,225 86.6 1,491 46.2 Ref
HPV Positive at Enrollment Yes 1,459 39.1 902 61.8 2.0 (1.8 – 2.2)
No 2,272 60.9 909 40.0 Ref
Number of Enrollment HPV Infections 2 or more types 549 14.7 361 65.8 2.3 (2.0 – 2.6)
1 type 910 24.4 541 59.5 1.9 (1.7 – 2.1)
0 types 2,272 60.9 909 40.0 Ref