Characteristics of included studies
| Study | Sexual-health behaviour | Media type | Interactivity | Attrition (%) | Target group | Duration of intervention | Design (follow-up) | Results |
|---|---|---|---|---|---|---|---|---|
| Bilardi et al37 | STI testing | Website | Interactive | 86 | Young people <24 years | 1 Session | Cohort (6 months) | No change in STI testing |
| Blas et al27 | STI testing | Online video | Static | 0 | MSM | 1 Session | RCT (1–4 months) | No difference in STI testing between control and intervention groups |
| Bowen et al31 | Condom use | Website | Interactive | 31 | MSM | Three 20 min sessions, across 10 days | RCT (at conclusion of intervention) | Intervention group significantly more likely to use condoms |
| Bull et al32 | Condom use | Social media (Facebook) | Interactive | 45 | Young people <24 years | 2-month exposure to Facebook campaign | RCT (2 and 6 months) | Intervention group significantly more likely to use condoms at 2 months, effect not present at 6 months |
| Carpenter et al33 | Condom use | Website | Interactive | 3 | MSM | 1 Session | RCT (3 months) | Significant increase in condom use for both control and intervention groups |
| Gold et al41 | Condom use and STI testing | Mobile (SMS) | Static | 38 | Young people <29 years | 4 months | RCT (6 months) | No difference in condom use or STI testing |
| Gold et al42 | Condom use and STI testing | Mobile (SMS) | Static | 67 | Young people <29 years | 6 months | Cohort (6 months) | Significant increase in STI testing in intervention group; no difference for condom use |
| Hirshfield et al43 | Condom use and STI testing | Website | Static | 48 | MSM | 1 Session | RCT (3 months) | Intervention groups had significant increase in condom use; no difference in STI testing |
| Howard et al34 | Condom use | Website | Static | 58 | Female teenagers | 1 Session | RCT (3–6 months) | Intervention group significantly more likely to use condoms |
| Jones et al35 | Condom use | Social media (Facebook) | Static | 0 | Young people <24 years | 18-month exposure to Facebook campaign | One off survey | Participants reported increased condom use |
| Kang et al39 | Condom use and STI testing | Website and email | Interactive | 56 | Young people <24 years | 6 months | RCT (6 months) | Significant increase in STI testing for the intervention group |
| Lim et al44 | Condom use and STI testing | Mobile (SMS) and email | Static | 62 | Young people <29 years | 12 months | RCT (12 months) | No effect on condom use; females in intervention group significantly more likely than females in the control to have STI testing |
| Mevissen et al45 | Condom use and STI testing | Website | Interactive | 33 | Young people <25 years | 1 Session | RCT (3 months) | Intervention group significantly more likely to use condoms; no effect on STI testing |
| Rhodes et al40 | STI testing | Chat room | Interactive | 9 | MSM | 6 months | Cohort (6 months) | Significantly higher rates of STI testing |
| Suffoletto et al36 | Condom use | Mobile (SMS) | Interactive | 45 | Female teenagers | 3 months | RCT (3 months) | No significant increases in condom use |
MSM, men who have sex with men; RCT, randomised controlled trial; STI, sexually transmitted infection.