Variables associated with repeat testing rate, restricted to clients reporting two or more test episodes (434 GCO clients, and 8200 clinic clients)
| Number of test episodes | Number of person-years | Repeat testing rate (per person-year) | Unadjusted RR (95% CI) | Adjusted RR (95% CI) | |
| Client group | |||||
| STI clinics | 20 953 | 13 666 | 1.53 | Reference | Reference |
| GCO | 858 | 458 | 1.87 | 1.22 (1.14 to 1.31) | 1.26 (1.15 to 1.37) |
| Age (years) | |||||
| <30 years | 8520 | 5845 | 1.46 | Reference | Reference |
| 30–39 | 6978 | 4561 | 1.53 | 1.05 (1.02 to 1.08) | 1.02 (0.98 to 1.06) |
| 40+ | 6313 | 3718 | 1.70 | 1.16 (1.13 to 1.46) | 1.04 (1.00 to 1.08) |
| Gender/sexual orientation | |||||
| Women | 3104 | 2872 | 1.08 | Reference | Reference |
| MSM | 15 166 | 7869 | 1.93 | 1.78 (1.72 to 1.85) | 1.96 (1.83 to 2.03) |
| MSW | 3243 | 3218 | 1.01 | 0.93 (0.89 to 0.98) | 0.82 (0.77 to 0.87) |
| Symptoms | |||||
| No | 13 702 | 9517 | 1.44 | Reference | Reference |
| Yes | 8109 | 4607 | 1.76 | 1.22 (1.19 to 1.26) | 1.36 (1.31 to 1.40) |
| Partner contact to STI | |||||
| No | 15 579 | 11 248 | 1.39 | Reference | Reference |
| Yes | 6232 | 2876 | 2.17 | 1.56 (1.52 to 1.61) | 1.43 (1.38 to 1.49) |
| History of STI diagnosis | |||||
| No | 15 665 | 10 583 | 1.48 | Reference | Reference |
| Yes | 6146 | 3542 | 1.74 | 1.17 (1.14 to 1.21) | 1.13 (1.09 to 1.17) |
| HIV-positive partner | |||||
| No | 20 013 | 13 486 | 1.48 | Reference | Reference |
| Yes | 1798 | 638 | 2.82 | 1.90 (1.81 to 1.99) | 1.48 (1.40 to 1.56) |
| Pre-implementation rate of testing (log-transformed) | – | – | – | 1.36 (1.34 to 1.39) | 1.26 (1.23 to 1.28) |
GCO, GetCheckedOnline; MSM, men who have sex with men; MSW, men who have sex with women; RR, relative rate; STI, sexually transmitted infection.