Table 2.
Effect of decision aid on patient knowledge, decisional conflict, trust in physician, patient involvement in decision, and acceptability of the decision aid. Values are numbers (percentages) unless stated otherwise
| Outcome | Usual care (n=447) | Decision aid (n=451) | Mean difference (95% CI) or P value |
|---|---|---|---|
| Patient knowledge | |||
| Eight knowledge questions | 3.6 (1.5) | 4.2 (1.5) | 0.66 (0.46 to 0.86) |
| Correctly assessed 45 day risk for ACS | 2 (0.4) | 10 (2.2) | 0.039 |
| Correctly assessed 45 day risk for ACS within 10% | 81 (18.1) | 293 (65.0) | <0.001 |
| Decisional conflict and trust | |||
| Decisional conflict scale | 46.4 (14.8) | 43.5 (15.3) | -2.9 (-4.8 to -0.90) |
| Trust in physician scale | 87.7 (16.0) | 89.5 (13.4) | 1.7 (-0.2 to 3.6) |
| Patient involvement in decision | |||
| OPTION scale (n=536) | 7.9 (5.4) | 18.3 (9.4) | 10.3 (9.1 to 11.5) |
| Patient acceptability | |||
| Amount of information: | |||
| Too little (1-2) | 24 (5.5) | 12 (2.7) | 0.133 |
| Just right (3-5) | 401 (91.6) | 416 (94.3) | |
| Too much (6-7) | 13 (3.0) | 13 (2.9) | |
| Clarity of information: | |||
| Not clear at all (1-2) | 5 (1.1) | 7 (1.6) | 0.011 |
| Somewhat clear (3-5) | 137 (31.3) | 98 (22.3) | |
| Extremely clear (6-7) | 296 (67.6) | 335 (76.1) | |
| Helpfulness of the information: | |||
| Not helpful at all (1-2) | 10 (2.3) | 7 (1.6) | 0.506 |
| Somewhat helpful (3-5) | 125 (28.5) | 114 (25.9) | |
| Extremely helpful (6-7) | 303 (69.2) | 320 (72.6) | |
| Would recommend to others: | |||
| Yes (1-2) | 349 (79.9) | 387 (88.0) | 0.004 |
| Not sure (3-5) | 77 (17.6) | 44 (10.0) | |
| No (6-7) | 11 (2.5) | 9 (2.0) | |
| Would want to use for other decisions: | |||
| Yes (1-2) | 335 (76.7) | 346 (78.6) | 0.813 |
| Not sure (3-5) | 83 (19.0) | 77 (17.5) | |
| No (6-7) | 19 (4.3) | 17 (3.9) | |
| Clinician acceptability | |||
| Helpfulness of the information: | |||
| Not helpful at all (1-2) | 13 (3.1) | 24 (5.5) | <0.001 |
| Somewhat helpful (3-5) | 265 (63.2) | 175 (40.3) | |
| Extremely helpful (6-7) | 141 (33.7) | 235 (54.1) | |
| Would recommend to others: | |||
| Yes (1-2) | 175 (41.9) | 271 (62.7) | <0.001 |
| Not sure (3-5) | 234 (56.0) | 148 (34.3) | |
| No (6-7) | 9 (2.2) | 13 (3.0) | |
| Would want to use for other decisions: | |||
| Yes (1-2) | 183 (43.8) | 273 (62.9) | <0.001 |
| Not sure (3-5) | 229 (54.8) | 148 (34.1) | |
| No (6-7) | 6 (1.4) | 13 (3.0) | |