Secondary outcome measures before and after the intervention
| Outcome measure | Mean ± SD or % (range) | Absolute difference | Adjusted RR or MD* (95% CI) | |||
|---|---|---|---|---|---|---|
| Before intervention | After intervention | |||||
| Intervention units n = 5 | Control units n = 4 | Intervention units n = 5 | Control units n = 4 | |||
| Patients | Immediately after consultation | |||||
| Decisional conflict† | 5.1 (0 to 13.5) | 4.2 (0 to 8.9) | 4.6 (2.6 to 7.4) | 6.3 (0 to 12.8) | 1.7 | RR 0.8 (0.2 to 2.4) |
| Quality of decision§ | 8.7 ± 1.5 | 8.7 ± 1.5 | 8.5 ± 1.6 | 8.5 ± 1.5 | 0.0 | MD 0.0 (−0.4 to 0.4) |
| 2 wk after consultation | ||||||
| Quality of life‡ | ||||||
| Physical scale | 49.3 ± 8.8 | 47.7 ± 8.9 | 49.4 ± 7.5 | 48.2 ± 7.8 | 1.2 | MD 0.4 (−2.6 to 3.3) |
| Mental scale | 51.2 ± 8.0 | 48.5 ± 11.0 | 50.8 ± 9.3 | 51.2 ± 8.4 | 0.4 | MD −1.9 (−4.9 to 1.1) |
| Intention to engage in shared decision-making¶ | 1.9 ± 1.2 | 2.0 ± 1.2 | 2.1 ± 1.1 | 1.9 ± 1.2 | 0.2 | MD 0.2 (−0.1 to 0.4) |
| Adherence to decision | 91.6 (88.9 to 94.6) | 88.4 (84.1 to 93.2) | 87.7 (86.2 to 88.5) | 91.5 (84.8 to 100) | 3.8 | RR 1.0 (0.9 to 1.0) |
| Repeat consultation for the same reason | 21.6 (12.1 to 29.7) | 13.4 (9.9 to 15.9) | 22.7 (10.3 to 27.3) | 15.2 (11.9 to 19.4) | 7.5 | RR 1.3 (0.7 to 2.3) |
| Regret over decision** | 10.5 ± 15.4 | 10.8 ± 20.8 | 12.4 ± 19.1 | 7.6 ± 13.7 | 4.8 | MD 4.8 (0.9 to 8.7) |
| Physicians | Immediately after consultation | |||||
| Decisional conflict† | 4.5 (0 to 9.0) | 3.0 (0 to 5.9) | 4.6 (0 to 6.1) | 1.1 (0 to 2.4) | 3.5 | RR 3.4 (0.3 to 38.0) |
| Quality of decision§ | 8.2 ± 1.1 | 8.2 ± 1.4 | 8.2 ± 1.3 | 8.4 ± 1.0 | 0.2 | MD −0.2 (−0.6 to 0.2) |
| At study entrance | At study exit | |||||
| Intention to engage in shared decision-making¶ | 1.6 ± 0.8 | 1.6 ± 0.9 | 1.7 ± 0.9 | 1.8 ± 0.7 | 0.1 | MD 0.0 (−0.3 to 0.2) |
| Intention to follow clinical practice guidelines¶ | 2.2 ± 0.6 | 2.2 ± 0.7 | 2.0 ± 0.7 | 2.2 ± 0.7 | 0.2 | MD −0.2 (−0.5 to 0.1) |
Note: CI = confidence interval, MD = mean difference, RR = relative risk, SD = standard deviation.
↵* Adjusted for cluster design and baseline values.
↵† Proportion who had a value of 2.5 or more on the Decisional Conflict Scale (1 = low decisional conflict, 5 = very high decisional conflict).
↵§ 0 = very low quality, 10 = very high quality.
↵‡ 0 = much worse, 100 = much better.
↵¶ Scored on a 3-item scale. Scores are presented as a mean of the score obtained from the 3 items. −3 = strongly disagree, 3 = strongly agree.
↵** 0 = very low regret, 100 = very high regret.