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. 2016 Aug 17;92(8):571–578. doi: 10.1136/sextrans-2015-052354

Table 2.

Summary of results for studies assessing condom use before and after testing for HIV

Study Condom outcome measure Sample size Baseline value of outcome Absolute change after testing Follow-up time (months) p Value
Consistent condom use
Gray et al19 Consistent use in last year 2474 (circumcised) 32.6% 3.1% decrease 24 NR
2522 (uncircumcised) 33.7% 3.0% decrease
Ruzagira et al21 Always used in last year 495 16.4% 10.6% decrease 24 NR
Wawer et al22 Consistent use in last year 648 (with circumcised partners) 0.3% 0.8% increase 24 NR
597 (with uncircumcised partners) 0.8% 0.2% decrease
Kiene et al20 100% use with risky partner* in last 3 months 131 (risky participants) NR 7.6% increase 3 NR
Ramjee et al28 100% use in last week 958 49.2% 0.1% decrease 12 NR
Matambo et al32 No unprotected sex in last 3 months 388 17.5% 0.2% decrease 3 0.84
No condom use
Gray et al19 Not used in last year 2474 (circumcised) 39.5% 3.1% decrease 24 NR
2522 (uncircumcised) 37.3% 1.2% decrease
Ruzagira et al21 Not used in last year 495 40.0% 40.0% decrease 24 NR
Wawer et al22 Not used in last year 648 (with circumcised partners) 85.5% 1.0% decrease 24 NR
597 (with uncircumcised partners) 81.2% 2.8% decrease
Ramjee et al28 Not used in last week 958 45.4% 0.7% increase 12 NR
Padian et al29 % did not use condoms at any time in last 3 months 2523 (intervention†) 30% 19% decrease 24 <0.0001
2522 (control†) 30% 25% decrease <0.0001
Unprotected sex
Bechange et al24 % reporting risky sex in last 3 months‡ 236 (sexually active) 30.9% 16.6% decrease 24 NR
Mugwanya et al25 § % reporting unprotected sex with HIV+partner in last month 4747 (taking pre-exposure prophylaxis) 27.3% 18% decrease 24 NR
Djomand et al31 % reporting unprotected sex in last 6 months 64 (males) 66.7% 10.0% decrease 12 NR
33 (females) 60.6% 17.1% decrease
Padian et al29 % did not use condom at last sex 2523 (intervention†) 32% 8% increase 24 NR
2522 (control†) 33% 15% decrease NR
Measures of unprotected acts
Kiene et al20 % of risky acts* that were unprotected in the last 3 months 213 93.1% 0.8% increase
Kalichman et al27 % of acts for which condoms not used in last 30 days 29 (seroconverted after initial −ve test) 33.1% 24.0% decrease 12 <0.01
77 (persistently HIV−) 33.3% 22.6% decrease <0.01
Van Damme et al30 Number of sex acts without condom in past week 2120 1.9 acts Relative decrease by 24.2% 12 <0.001
Ritchie et al26 Median sexual behaviour score¶ 72 (serodiscordant) 0.0085 Relative decrease of 100.0% 9 NR
28 (seroconcordant) 0.024 Relative decrease of 25.0%

Baseline percentages are calculated as the percentage of people reporting a given outcome. Changes after testing represent absolute changes unless explicitly reported as relative.

*Kiene et al20 risky sex is sex with a partner who is HIV-positive or of unknown serostatus.

†In Padian et al29 intervention participants received a diaphragm, lubricant and male condoms, while control arm participants received only male condoms.

‡Bechange et al24 defined risky sex as “risky sex as intercourse with inconsistent condom use with an HIV-infected partner or a partner of unknown serostatus during the prior 3 months”.

§Additional data obtained from Baeten et al.39

¶Ritchie et al define a sexual behaviour score by the number of different types of unprotected sex acts over the last 3 months weighted by the likelihood of HIV acquisition by the given type of sex act. Note that, unlike in Gray et al19 and Ramjee et al28 we include individuals reporting no sexual activity as having 100% condom use.

NR, not reported.