Best fitting model and associated risk scoring for study 1
| Factor | OR (95% CI) | Add to score |
|---|---|---|
| Sex | ||
| Male | 1 – | 0 |
| Female | 9.81 (5.35 to 18.0) | 2 |
| Age (years) | ||
| 24 or less | 1 – | 0 |
| 25–29 | 2.90 (0.87 to 9.69) | 1 |
| 30+ | 8.78 (2.88 to 26.7) | 2 |
| Number of lifetime sexual partners | ||
| 0 | 1 – | 0 |
| 1–2 | 1.16 (0.12 to 11.1) | 0 |
| 3–9 | 5.14 (0.63 to 41.8) | 2 |
| 10+ | 18.63 (2.27 to 153) | 3 |
| Genital blisters | ||
| Never | 1 – | 0 |
| Once | 5.93 (1.33 to 26.4) | 2 |
| Less than once per year | 16.36 (5.56 to 48.1) | 3 |
| 1–3 times per year | 18.50 (7.05 to 48.6) | 3 |
| 4+ times per year | 20.34 (4.11 to 101) | 3 |