Table 4.
Effects of the decision aid related to depth of use
| T0 (baseline) | T1 (immediately after use of the decision aid) | T2 (2 weeks after baseline) | T0–T1 | T0–T2 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Means (SD) | Means (SD) | Means (SD) | T | p | ES | T | p | ES | |
| Decisional conflict (0–100)a | |||||||||
| Low engagementb | 35.75 (21.12) | 27.08 (15.83) | 25.57 (16.99) | 4.48 | <0.001 | 0.63 | 3.93 | <0.001 | 0.59 |
| High engagementc | 35.55 (16.95) | 23.58 (15.85) | 27.79 (22.35) | 6.58 | <0.001 | 0.96 | 2.02 | 0.050 | 0.32 |
| Knowledge (0–15) | |||||||||
| Low engagement | 9.22 (2.97) | 12.37 (2.03) | 11.95 (1.93) | −7.59 | <0.001 | −1.06 | −5.64 | <0.001 | −0.85 |
| High engagement | 9.34 (2.64) | 14.00 (1.14) | 13.39 (1.62) | −12.94 | <0.001 | −1.89 | −8.96 | <0.001 | −1.45 |
| Realistic expectations (0–3) | |||||||||
| Low engagement | 0.64 (0.76) | 1.45 (1.14) | 1.08 (1.03) | −5.49 | <0.001 | −0.75 | −3.25 | 0.002 | −0.45 |
| High engagement | 0.84 (0.65) | 2.08 (0.90) | 1.24 (0.87) | −9.81 | <0.001 | −1.39 | −2.92 | 0.005 | −0.41 |
| Level of deliberation (6–30) | |||||||||
| Low engagement | 23.63 (4.72) | 22.87 (4.33) | 23.51 (3.99) | 1.13 | 0.268 | 0.18 | 0.20 | 0.842 | 0.03 |
| High engagement | 22.58 (4.23) | 24.78 (2.64) | 24.67 (2.72) | −3.43 | 0.002 | −0.57 | −2.31 | 0.028 | −0.42 |
| Decision self‐efficacy (0–100) | |||||||||
| Low engagement | 77.68 (13.42) | 77.64 (16.85) | 77.38 (15.19) | 0.02 | 0.985 | 0.00 | 0.04 | 0.968 | 0.01 |
| High engagement | 76.89 (11.44) | 81.19 (14.21) | 82.00 (12.96) | −2.67 | 0.010 | −0.39 | −3.65 | 0.001 | −0.60 |
Decisional conflict scale excluding effective decision subscale. b≤15 pages. c>15 pages.