Table 2.
Factors associated with the uptake of the campaign message, according to HIV risk status, Break the Chains (BTC), Switzerland, March to May 2015, postcampaign survey (among respondents who reported having heard of the campaign: n=402/688)
| All respondents | Risk reduction in April until tested* | Risk reduction in April until tested | ||||||||||
| n=402 | Column % | Yes, n=251 | No, n=151 | OR | 95% CI | P value from LR test | aOR | 95% CI | P value from LR test | |||
| N | Column% | N | Column% | |||||||||
| BTC target group | <0.001 | <0.001 | ||||||||||
| MSMwr | 199 | 49.5 | 95 | 37.9 | 104 | 68.9 | 0.28 | 0.18 to 0.42 | 0.24 | 0.14 to 0.42 | ||
| MSMnr | 203 | 50.5 | 156 | 62.1 | 47 | 31.3 | Ref. | |||||
| Felt personally concerned by BTC | 0.005 | 0.066 | ||||||||||
| Yes | 152 | 37.8 | 109 | 43.4 | 43 | 28.5 | 1.84 | 1.19 to 2.84 | 1.70 | 0.96 to 3.00 | ||
| No | 245 | 61.0 | 142 | 56.6 | 103 | 68.2 | Ref. | Ref. | ||||
| No response | 5 | 1.2 | 0 | 0.0 | 5 | 3.3 | ||||||
| Understand the message of BTC | 0.011 | 0.224 | ||||||||||
| Yes | 263 | 65.4 | 176 | 70.1 | 87 | 57.6 | 1.73 | 1.13 to 2.63 | 1.42 | 0.81 to 2.51 | ||
| No | 139 | 34.6 | 75 | 29.9 | 64 | 42.4 | Ref. | Ref. | ||||
| Participation in previous BTC campaign | <0.001 | 0.002 | ||||||||||
| Yes | 123 | 30.6 | 96 | 38.3 | 27 | 17.9 | 2.84 | 1.75 to 4.63 | 2.62 | 1.41 to 4.85 | ||
| No | 279 | 69.4 | 155 | 61.8 | 124 | 82.1 | Ref. | Ref. | ||||
| Age | 0.508 | 0.270 | ||||||||||
| <25 year. | 19 | 4.7 | 13 | 5.2 | 6 | 4.0 | 1.55 | 0.55 to 4.34 | 2.76 | 0.75 to 10.12 | ||
| 25–49 year. | 215 | 53.5 | 137 | 54.6 | 78 | 51.7 | 1.26 | 0.80 to 1.97 | 1.06 | 0.59 to 1.90 | ||
| ≥50 year. | 127 | 31.6 | 74 | 29.5 | 53 | 35.1 | Ref. | Ref. | ||||
| No response | 41 | 10.2 | 27 | 10.8 | 14 | 9.3 | ||||||
| University degree | 0.011 | 0.053 | ||||||||||
| Yes | 250 | 62.2 | 168 | 66.9 | 82 | 54.3 | 1.72 | 1.13 to 2.61 | 1.74 | 0.99 to 3.06 | ||
| No | 149 | 37.1 | 81 | 32.3 | 68 | 45.0 | Ref. | Ref. | ||||
| No response | 3 | 0.8 | 2 | 0.8 | 1 | 0.7 | ||||||
| Live in area with >100 000 inhabitants | 0.416 | 0.587 | ||||||||||
| Yes | 165 | 41.0 | 107 | 42.6 | 58 | 38.4 | 1.19 | 0.79 to 1.79 | 1.17 | 0.67 to 2.03 | ||
| No | 235 | 58.5 | 143 | 57.0 | 92 | 60.9 | Ref. | Ref. | ||||
| No response | 2 | 0.5 | 1 | 0.4 | 1 | 0.7 | ||||||
| Community connectedness | 0.017 | 0.475 | ||||||||||
| Mean | 2.47 | 2.54 | 2.36 | |||||||||
| Score 1–2.5 | 195 | 54.5 | 110 | 49.6 | 85 | 62.5 | Ref. | Ref. | ||||
| Score 2.6–4 | 163 | 45.5 | 112 | 50.5 | 51 | 37.5 | 1.70 | 1.10 to 2.62 | 1.23 | 0.70 to 2.14 | ||
| Regularly visit sex-on-premises venues† | 0.009 | 0.032 | ||||||||||
| Yes (frequently) | 66 | 16.4 | 31 | 12.4 | 35 | 23.2 | 0.50 | 0.29 to 0.84 | 0.46 | 0.22 to 0.94 | ||
| No (sometimes/never) | 324 | 80.6 | 213 | 84.9 | 111 | 73.5 | Ref. | Ref. | ||||
| No response | 12 | 3.0 | 7 | 2.8 | 5 | 3.3 | ||||||
| Frequent use of the internet for sexual encounters† | <0.001 | 0.024 | ||||||||||
| Yes (frequently) | 178 | 44.3 | 88 | 35.1 | 90 | 59.6 | 0.36 | 0.24 to 0.55 | 0.52 | 0.30 to 0.92 | ||
| No (sometimes/never) | 221 | 55.0 | 161 | 64.1 | 60 | 39.7 | Ref. | Ref. | ||||
| No response | 3 | 0.8 | 2 | 0.8 | 1 | 0.7 | ||||||
*Respondents were categorised as having adopted an risk reduction strategy if they reported ‘always’ to either of two questions asking whether they had followed one of the two strategies promoted by the campaign (ie, followed safer sex practices (151 respondents), or a risk reduction strategy adapted to their personal situation (232 respondents)). Other answer categories were ‘sometimes’, ‘never’ and ‘no answer’. (For exact question wording, see online supplementary table S2.)
†In the last 12 months.
aOR, adjusted OR, adjusted for all variables in the table; LR, likelihood ratio; MSM, men who have sex with men; MSMnr, MSM with no HIV risk; MSMwr, MSM with HIV risk; Ref., reference category.