Assessing comparability of HSV-2 risk associations across studies for three risk factors
| Factor | Study 1 | Study 2 | Study 3 | Study 4 |
|---|---|---|---|---|
| Lifetime sexual partners | ||||
| 0–2 | 1 – | 1 – | 1 – | 1 – |
| 3–9 | 6.01 (2.52 to 14.3) | 4.27 (0.97 to 18.8) | 2.26 (1.71 to 2.98) | 7.99 (2.77 to 23.0) |
| 10+ | 20.3 (8.40 to 49.0) | 7.18 (1.66 to 31.1) | 3.84 (2.74 to 5.38) | 19.8 (6.87 to 57.0) |
| Age (years) | ||||
| ≤29 | 1 – | 1 – | 1 – | 1 – |
| 30–34 | 2.96 (1.50 to 5.82) | 2.73 (1.75 to 4.24) | 1.65 (1.24 to 2.18) | 1.65 (0.88 to 3.10) |
| 35+ | 4.22 (2.47 to 7.20) | 3.96 (2.52 to 6.23) | 2.46 (1.73 to 3.48) | 2.34 (1.41 to 3.90) |
| Sex | ||||
| Male | 1 – | 1 – | Women only | 1 – |
| Female | 7.82 (4.59 to 13.3) | 2.14 (1.46 to 3.14) | 5.55 (3.29 to 9.36) | |