Table 3

Results of univariable and multivariable logistic regression for outcome

Univariable analysisMultivariable analysis
VariableOR (95% CI)p ValueOR (95% CI)p Value
Tested positive for rectal infection
Age (in years, continuous)0.97 (0.96 to 0.99)0.0010.97 (0.95 to 0.98)<0.001
HIV (prevalent)*1.30 (0.98 to 1.72)0.0701.60 (1.13 to 2.25)0.008
Number of sex partners in last 6 months
 1 partnerRef.Ref.
 2–5 partners1.63 (0.99 to 2.66)0.0531.85 (1.12 to 3.06)0.016
 6–10 partners1.87 (1.08 to 3.23)0.0252.10 (1.21 to 3.67)0.009
 ≥11 partners2.75 (0.05 to 0.11)<0.0012.95 (1.73 to 5.03)<0.001
URAI1.68 (1.24 to 2.26)0.0011.54 (1.11 to 2.13)0.010
PRAI1.34 (0.98 to 1.82)0.066
UIAI1.45 (1.07 to 1.95)0.017
PIAI1.12 (0.82 to 1.52)0.484
Receptive anilingus1.30 (0.96 to 1.76)0.091
Receptive fisting1.41 (0.75 to 2.66)0.282
Partner used saliva as lubricant
 NoRef.Ref.
 Yes1.74 (1.18 to 2.57)0.005
 Did not remember2.07 (1.13 to 3.79)0.0181.90 (1.03 to 3.52)0.040
Tested positive for pharyngeal infection
Age (in years, continuous)0.97 (0.95 to 0.99)0.0010.96 (0.94 to 0.98)<0.001
HIV (prevalent)*1.30 (0.98 to 1.72)0.0701.78 (1.18 to 2.69)0.006
Number of sex partners in last 6 months
 1 partnerRef.Ref.
 2–5 partners1.85 (0.92 to 3.74)0.086
 6–10 partners2.65 (1.25 to 5.61)0.0112.88 (1.35 to 6.12)0.006
 ≥ 11 partners4.48 (2.20 to 9.13)<0.0014.96 (2.42 to 10.16)<0.001
ROI1.31 (0.77 to 2.22)0.318
Ejaculate in the mouth0.91 (0.66 to 1.37)0.642
Active anilingus1.21 (0.84 to 1.75)0.310
  • *The reference category consists of participants not known to be HIV-positive and newly-diagnosed HIV infections.

  • PIAI, protected insertive anal intercourse; PRAI, protected receptive anal intercourse; UIAI, unprotected insertive anal intercourse; URAI, unprotected receptive anal intercourse; ROI, receptive oral intercourse.