Table 3

Effect of a contingency management intervention on reports of any non-concordant unprotected anal intercourse in the prior 6 weeks and the number of non-concordant unprotected anal intercourse partners in the prior 6 weeks

Proportion reporting any non-concordant UAI, n (%)


Visit

Total

Contingency Management

Control

Unadjusted RR (95% CI)

Adjusted RRa (95% CI)


Baseline

35/127 (28)

21/70 (30)

14/57 (25)

Week 6

18/92 (20)

9/48 (19)

9/44 (20)

Week 12

12/102 (12)

8/56 (14)

4/46 (9)

1.13 (0.54, 2.37)

0.80 (0.47, 1.35)

Week 18

9/99 (9)

3/53 (6)

6/46 (13)

Week 24

11/107 (10)

6/60 (10)

5/47 (11)

0.67 (0.24, 1.85)

0.51 (0.21, 1.25)


Self-reported non-concordant UAI partners, mean (SD)


Visit

Total

Contingency Management

Control

Unadjusted Rate Ratio (95% CI)

Adjusted Rate Ratiob (95% CI)


Baseline

1.35 (4.6)

1.70 (5.5)

0.90 (2.7)

Week 6

0.47 (1.5)

0.35 (0.9)

0.60 (1.9)

Week 12

0.19 (1.0)

0.09 (0.3)

0.30 (1.4)

0.46 (0.14, 1.52)

0.58 (0.17, 1.90)

Week 18

0.12 (0.4)

0.09 (0.4)

0.15 (0.4)

Week 24

0.11 (0.4)

0.10 (0.3)

0.13 (0.4)

0.70 (0.25, 1.95)

0.49 (0.18, 1.37)


CI, confidence interval; RR, relative risk; SD, standard deviation; UAI, unprotected anal intercourse.

aAdjusted for HIV status, report of non-concordant UAI in the prior 6 weeks at baseline and use of other substances (inhaled nitrites, gamma-hydroxybutyrate, ecstasy, or erectile dysfunction medications) in the prior 6 weeks at baseline.

bAdjusted for HIV status, number non-concordant UAI partners in the prior 6 weeks at baseline and use of other substances (inhaled nitrites, gamma-hydroxybutyrate, ecstasy, or erectile dysfunction medications) in the prior 6 weeks at baseline.

Menza et al. BMC Public Health 2010 10:774   doi:10.1186/1471-2458-10-774

Open Data