Multivariable analysis for all GUM clinic attenders in 1995
| Factor | Level | Odds ratio (95% CI) | Change in deviance (d/f) p value |
|---|---|---|---|
| *Centres A–G based in London. | |||
| Centre* | E | 1.00 (baseline) | <0.0001 |
| A | 0.71 (0.35 to 1.42) | ||
| B | 1.37 (0.78 to 2.40) | ||
| C | 0.62 (0.32 to 1.18) | ||
| D | 0.79 (0.26 to 2.43) | ||
| F | 1.14 (0.64 to 2.03) | ||
| G | 0.84 (0.41 to 1.66) | ||
| H | 1.15 (0.42 to 3.13) | ||
| I | 0.42 (0.17 to 1.00) | ||
| J | 0.51 (0.24 to 1.08) | ||
| K | 0.26 (0.09 to 0.77) | ||
| L | 0.31 (0.13 to 0.69) | ||
| M | 0.22 (0.08 to 0.58) | ||
| N | 0.45 (0.21 to 0.98) | ||
| Age | <20 | 0.35 (0.13 to 0.94) | <0.0001 |
| 20–24 | 1.00 (baseline) | ||
| 25–34 | 2.71 (1.78 to 4.11) | ||
| 35–44 | 4.66 (3.00 to 7.24) | ||
| 45+ | 4.30 (2.52 to 7.32) | ||
| Country | Abroad | 1.00 (baseline) | 0.98 |
| UK | 0.97 (0.70 to 1.36) | ||
| Unknown | 0.99 (0.52 to 1.87) | ||
| IDU | No | 1.00 (baseline) | <0.0001 |
| Yes | 98.0 (72 to 134) | ||
| Gender | Female | 1.00 (baseline) | 0.71 |
| Male | 0.95 (0.71 to 1.26) | ||
| Sexual orientation | Heterosexual | 1.00 (baseline) | 0.0013 |
| Homosexual | 0.55 (0.37 to 0.80) | ||
| HIV status | Negative | 1.00 (baseline) | 0.08 |
| Positive | 1.74 (0.93 to 3.27) | ||