Table 2

Results from multinomial logistic regression analysis of sexually active patients in the past 2 months whose viral loads were >1500 copies/mL during that time, 2014–2015 (n=487)

Odds of condomless anal/vaginal intercourse with HIV-positive partners only (serosorting) versus
Always used a condom during anal/vaginal intercourse
Odds of condomless anal/vaginal intercourse with at-risk partners
versus Always used a condom during anal/vaginal intercourse
Unadjusted OR (95% CI)Adjusted‡ OR (95% CI)Unadjusted OR (95% CI)Adjusted‡ OR (95% CI)
Gender/sexual orientation§
 Heterosexual menRefRefRefRef
 MSM3.38 (2.03 to 5.64)**3.03 (1.73 to 5.31)**3.88 (1.84 to 8.18)**3.36 (1.52 to 7.46)**
 Women0.91 (0.51 to 1.62)0.87 (0.48 to 1.57)1.97 (0.91 to 4.25)1.90 (0.85 to 4.22)
Age at time of study entry, years
 18–35RefRefRefRef
 36–500.87 (0.56 to 1.36)1.10 (0.68 to 1.80)0.65 (0.36 to 1.16)0.83 (0.44 to 1.56)
 Over 500.43 (0.23 to 0.80)**0.62 (0.31 to 1.22)0.42 (0.19 to 0.94)*0.56 (0.23 to 1.33)
Race/ethnicity
 White, non-HispanicRefRefRefRef
 Black, non-Hispanic0.54 (0.31 to 0.92)*0.74 (0.41 to 1.33)0.59 (0.30 to 1.19)0.73 (0.34 to 1.55)
 Hispanic0.72 (0.37 to 1.41)0.86 (0.39 to 1.88)0.89 (0.38 to 2.09)0.99 (0.38 to 2.61)
 Other0.78 (0.23 to 2.62)0.68 (0.19 to 2.50)0.71 (0.14 to 3.77)0.62 (0.11 to 3.44)
Injection drug use as HIV acquisition risk factor¶
 NoRefRefRefRef
 Yes1.28 (0.66 to 2.48)1.26 (0.60 to 2.63)2.16 (1.02 to 4.56)*2.49 (1.09 to 5.67)*
Recency of testing HIV positive (from time of study entry)
 3–12 monthsRefRefRefRef
 13+ months0.49 (0.22 to 1.08)0.50 (0.22 to 1.17)0.37 (0.15 to 0.93)*0.45 (0.16 to 1.22)
Language of CASI
 EnglishRefRefRefRef
 Spanish0.50 (0.18 to 1.36)0.34 (0.10 to 1.14)0.63 (0.18 to 2.18)0.50 (0.11 to 2.16)
Viral load (copies/mL) contemporaneous to sexual behaviour
  >1500–10 000RefRefRefRef
 10 001–50 0001.49 (0.91 to 2.43)1.17 (0.69 to 1.99)0.98 (0.52 to 1.86)0.86 (0.43 to 1.69)
 50 001 and higher1.16 (0.70 to 1.92)0.96 (0.56 to 1.66)0.94 (0.49 to 1.78)0.80 (0.40 to 1.57)
Currently taking ART
 NoRefRefRefRef
 Yes0.53 (0.35 to 0.81)**0.64 (0.41 to 1.01)0.49 (0.29 to 0.84)**0.62 (0.35 to 1.10)
  • *p<0.05.

  • **p<0.01.

  • †At-risk partners were those perceived by study participant to be HIV-negative or of unknown serostatus at the time of the sexual activity.

  • ‡The multivariable model adjusts for all variables in the first column.

  • §There were five transgender participants. They were omitted as a separate subgroup of the gender/sexual orientation variable, but were retained in the other variables for the unadjusted analyses.

  • ¶This does not reflect whether the patient is a current injection drug user.

  • CASI, computer-assisted self-interview; MSM, men who have sex with other men.