| Outcome | Control/intervention | Outcome | Multivariable analysis | Chi-squared test for equality of proportions | Adjusted OR (95% CI) | |
| Group A | ||||||
| Test accepted | Intervention n = 534 | Test accepted | 462 (86.5) | 0.76 | 1.53 (0.84–2.81)#,¶ | |
| Test not accepted | 69 (12.9) | |||||
| Test information missing | 3 (0.6) | |||||
| Control n = 217 | Test accepted | 183 (84.3) | 1 | |||
| Test not accepted | 25 (11.5) | |||||
| Test information missing | 9 (4.1) | |||||
| Test offered | Intervention n = 655 | Test offered | 568 (86.7) | 0.002 | 1.67 (1.07–2.60)#,+ | |
| Test not offered | 86 (13.1) | |||||
| Offer information missing | 1 (0.2) | |||||
| Control n = 308 | Test offered | 235 (76.3) | 1 | |||
| Test not offered | 73 (23.7) | |||||
| Offer information missing | 0 (0) | |||||
| Coverage | Intervention n = 655 | Test coverage yes | 534 (81.5) | 0.004 | 1.83 (1.3–2.7)#,+ | |
| Test coverage no | 121 (12.1) | |||||
| Test coverage information missing | 0 (0) | |||||
| Control n = 308 | Test coverage yes | 221 (71.7) | 1 | |||
| Test coverage no | 87 (28.2) | |||||
| Test coverage information missing | 0 (0) | |||||
| Group B | ||||||
| Test accepted | Intervention n = 197 | Test accepted | 172 (87.3) | 0.4 | 1.40 (0.67–2.91)#,¶ | |
| Test not accepted | 21 (10.7) | |||||
| Test information missing | 4 (1.5) | |||||
| Control n = 112 | Test accepted | 91 (81.3) | 1 | |||
| Test not accepted | 18 (16.1) | |||||
| Test information missing | 3 (2.7) | |||||
| Test offered | Intervention n = 211 | Test offered | 202 (95.7) | 0.02 | 3.76 (1.31–12.25)#,+,§ | |
| Test not offered | 6 (2.8) | |||||
| Offer information missing | 3 (1.4) | |||||
| Control n = 141 | Test offered | 125 (88.7) | 1 | |||
| Test not offered | 14 (9.9) | |||||
| Offer information missing | 2 (1.4) | |||||
| Test coverage | Intervention n = 211 | Test coverage yes | 180 (85.3) | 0.04 | 1.84 (1.03–3.29)#,+ | |
| Test coverage no | 31 (14.7) | |||||
| Test coverage missing | 0 (0) | |||||
| Control n = 141 | Test coverage yes | 107 (75.9) | 1 | |||
| Test coverage no | 34 (24.1) | |||||
| Test coverage missing | 0 (0) | |||||
Data are presented as n (%), unless otherwise stated. Group A: clinics introducing opt-out testing, training and resources. Group B: clinics introducing training and resources only. #: adjusted for age group; ¶: model included only patients who had a test offered to them and who had not previously had a test; +: model included all patients having had a prior test; §: adjusted odds ratio obtained from exact logistic regression.