Table 2. Factors associated with membership of a phylogenetic pair or cluster.
| Not in a pair or cluster | Within a pair or cluster | p value | |
|---|---|---|---|
| Total no. of individuals | 13 (47.4) | 15 (53.6) | - |
| Age, years | 45.3 (35.8–49.3) | 44.8 (35.0–50.5) | 0.882 |
| Site of recruitment | |||
| Melbourne | 1 (6.67) | 10 (76.9) | 0.0021 |
| Recreational drug use | |||
| Injection drug | 8 (61.5) | 6 (40.0) | 0.450 |
| Non-injection drug | 6 (46.2) | 8 (53.3) | 0.705 |
| Sexual History2 | |||
| Median no. of sexual partners | 23 (8–44) | 7 (4–25) | 0.122 |
| Condomless receptive anal sex | 8 (72.3) | 11 (78.6) | 1.000 |
| Group sex | 7 (63.6) | 10 (71.4) | 1.000 |
| Fisting | 4 (36.4) | 8 (57.1) | 0.302 |
| STI3 | 4 (40.0) | 0 | 0.497 |
| Route of HCV acquisition | |||
| Sexual | 8 (61.5) | 9 (60.0) | 1.000 |
| HCV genotype | |||
| 1a | 6 (46.2) | 11 (73.3) | 0.246 |
| HIV RNA level <50 IU/mL | 8 (61.5) | 7 (46.7) | 0.476 |
1 p<0.05
2 For 25 individuals reporting detailed sexual behaviours within the six months prior to the study visit
3 For 13 individuals undergoing STI testing
Brackets denote % or IQR. Statistical analysis was performed with Mann-Whitney U, Chi-squared or Fishers exact tests.