| | Experimental group | Control group |
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SR2 status change | behaviour at pre-test | n | Mean | SD | n | Mean | SD |
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no | Unsafe | 26 | -0,58 | 1,27 | 31 | 0,00 | 1,32 |
| Safe | 94 | 0,10 | 0,51 | 66 | 0,20 | 0,77 |
| Total | 120 | -0,05 | 0,78 | 97 | 0,13 | 0,97 |
yes | Unsafe** | 13 | -0,92 | 2,43 | 4 | 0,50 | 2,52 |
| Safe | 16 | 0,69 | 1,08 | 13 | 1,46 | 1,94 |
| Total** | 29 | -0,03 | 1,95 | 17 | 1,24 | 2,05 |
Total | Unsafe** | 39 | -0,69 | 1,72 | 35 | 0,06 | 1,45 |
| Safe | 110 | 0,18 | 0,65 | 79 | 0,42 | 1,14 |
| Total** | 149 | -0,05 | 1,10 | 114 | 0,30 | 1,25 |
- Means and standard deviations (SD) for Unprotected Anal Intercourse (UAI)-change score (t2-t0) for insertive and receptive anal sex by study condition, steady relationship(SR)-status change (yes vs no) and sexual behaviour at pretest (safe vs unsafe)1.
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1 ANCOVA adjusted for ethnic background (Dutch vs non-Dutch) and educational level (low level: elementary school, vocational school or lower-level high school; high level: university, college, or higher- level high school).
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2 SR = steady relationship
- ** significant difference between experimental group and control group, P < 0.01