Effect of opt-in and opt-out strategies on recruitment of characteristics of the recruited sample
| Outcome | Opt-in (n = 44) | Opt-out (n = 40) | Percentage difference (95% CI) |
|---|---|---|---|
| Values in parentheses are given in percentages. | |||
| *Active role preference categorised by Degner roles A, B and C: patients want (A) total control over health decision making, (B) the final say after considering doctor’s advice or (C) to share the decision equally with their doctor. | |||
| Lives alone | 11 (25) | 8 (20) | 5% (−29.9% to 39.9%) |
| p = 0.73 | |||
| Finished education<16 years | 8 (18.2) | 12 (30) | −11.8% (−30% to 6.4%) |
| p = 0.13 | |||
| Self-reported fair or poor health | 5 (11.4) | 6 (15) | −3.6% (−18.1% to 10.9%) |
| p = 0.65 | |||
| Known to have a relative with bowel cancer | 10 (22.7) | 4 (10) | 12.7% (−2.8% to 28.2%) |
| p = 0.12 | |||
| Not previously screened for colorectal cancer | 18 (40.9) | 24 (60) | −19.1% (−40.1% to 1.9%) |
| p = 0.08 | |||
| Willing to screen for colorectal cancer with faecal occult blood testing | 41 (93.2) | 34 (85) | 8.2% (−5.1% to 21.5%) |
| p = 0.11 | |||
| Active decision-making role preference* | 33 (75) | 18 (45) | 30.0% (10% to 50%) |
| p = 0.003 | |||