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Table 3 Adjusted and unadjusted relative risk for acquisition of HIV among pregnant women.

From: The incidence of HIV among women recruited during late pregnancy and followed up for six years after childbirth in Zimbabwe

Variable No. tested No. HIV positive (%) Unadjusted RR (95% CI) Adjusted RR (95% CI)
Age of participant in years     
   35-42 17 1(5.8) Reference Reference
   30-34 42 2(4.8) 0.8(0.1-8.4) 1.0(0.1-9.9)
   25-29 101 6(5.9) 1.0(0.1-7.9) 0.9(0.1-8.6)
   20-24 184 15(8.2) 1.4(0.2-9.9) 1.1(0.1-9.2)
   15-19 98 15(15.3) 2.6(0.4-18.5) 2.2(0.3-18.2)
Marital status     
   Married 428 36(8.4) Referent Referent
   Single 13 3(23.1) 0.3(0.1-1.2) 0.4(0.1-1.7)
Polygamous marriage     
   No 396 30(7.6) Referent Referent
   Yes 29 5(17.2) 2.3(0.9-5.9) 2.6(0.8-8.5)
Have you been sexually abused?     
   No 418 34(8.1) Referent Referent
   Yes 22 4(8.2) 2.2(0.8-6.3) 3.1(1.2-8.0)
Education level of participant.     
   >primary 375 28(7.5) Referent Referent
   <primary 69 11(15.9) 2.1(1.1-4.3) 2.5(1.1-5.3)
Is partner a frequent traveler?     
   No 252 17(6.7) Referent Referent
   Yes 174 18(10.3) 1.5(0.8-3.0) 0.9(0.4-2.0)
Ever used intravaginal herbs?     
   No 380 33(8.7) Referent Referent
   Yes 61 5(8.2) 0.9(0.4-2.4) 0.7(0.2-2.3)
Age at sexual debut     
   ≥16 131 6(4.6) Referent Referent
   <16 308 33(10.7) 2.3(1.0-5.6) 1.9(0.5-7.6)
Used condom at sexual debut?     
   Yes 45 6(13.3) Referent Referent
   No 393 32(8.1) 1.6(0.7-3.9) 1.5(0.5-4.7)
Ever used a condom?     
   No 246 22(8.9) Referent Referent
   Yes 191 17(8.9) 1.0(0.5-1.9) 1.2(0.5-3.1)
Casual partners in past 12 months     
   No 433 36(8.3) Referent Referent
   Yes 9 2(22.2) 2.7(0.6-11.1) 2.0(0.6-7.0)
No. of lifetime sexual partners     
   <2 350 25(7.1) Referent Referent
   ≥2 93 14(15.0) 2.1(1.1-4.1) 0.8(0.3-2.2)
Siblings have same father?     
   Yes 370 27(7.3) Referent Referent
   No 45 9(20.0) 2.7(1.3-5.8) 1.8(0.6-4.9)
Do you have genital itching?     
   No 291 20(6.9) Referent Referent
   Yes 151 19812.6) 1.8(1.0-3.4) 0.8(0.4-2.0)
Laboratory-diagnosed syphilis     
   Negative 403 35(8.7) Referent Referent
   Positive 2 1(50.0) 5.8(0.8-42.0) 8.5(1.4-50.4)
Clinical genital warts     
   Absent 381 33(8.7) Referent Referent
   Present 18 4(22.2) 2.7(0.9-7.2) 1.2(0.9-1.5)