Table 2.
Demographics of participating physicians
| All physicians N = 376 |
Optimistic physiciansa N = 277 |
Non-optimistic physiciansa N = 99 |
p valueb | |
|---|---|---|---|---|
| Gender – n (%) | 0.69 | |||
| Male | 233 (62.0) | 173 (62.5) | 60 (60.6) | |
| Female | 141 (37.5) | 102 (36.8) | 39 (39.4) | |
| Missing | 2 (0.5) | 2 (0.7) | 0 | |
| Age group, years – n (%) | 0.67 | |||
| 30 to 44 | 76 (20.2) | 56 (20.2) | 20 (20.2) | |
| 45 to 60 | 219 (58.2) | 157 (56.7) | 62 (62.6) | |
| >60 | 76 (20.2) | 60 (21.7) | 16 (16.2) | |
| Prefer not to answer | 4 (1.1) | 3 (1.1) | 1 (1.0) | |
| Missing | 1 (0.3) | 1 (0.4) | 0 (0) | |
| Years in practice – n (%) | 0.90 | |||
| <5 | 1 (0.3) | 1 (0.4) | 0 (0) | |
| 5 to <10 | 29 (7.7) | 20 (7.2) | 9 (9.1) | |
| 10 to <15 | 59 (15.7) | 45 (16.2) | 14 (14.1) | |
| 15 to <20 | 78 (20.7) | 56 (20.2) | 22 (22.2) | |
| ≥20 | 208 (55.3) | 154 (55.6) | 54 (54.6) | |
| Missing | 1 (0.3) | 1 (0.4) | 0 (0) | |
| Practice environment | ||||
| Practice setting – n (%) | 0.22 | |||
| Solo practice | 135 (35.9) | 106 (38.3) | 29 (29.3) | |
| Group practice | 234 (62.2) | 166 (59.9) | 68 (68.7) | |
| Others | 5 (1.3) | 3 (1.1) | 2 (2.0) | |
| Missing | 2 (0.5) | 2 (0.7) | 0 (0) | |
| Associated with an academic teaching center – n (%) | 0.04 | |||
| Yes | 133 (35.4) | 106 (38.3) | 27 (27.3) | |
| No | 241 (64.1) | 169 (61.0) | 72 (72.7) | |
| Missing | 2 (0.5) | 2 (0.7) | 0 (0) | |
| Geographic region – n (%) | 0.98 | |||
| Northwest | 146 (38.8) | 108 (39.0) | 38 (38.4) | |
| Midwest | 88 (23.4) | 65 (23.5) | 23 (23.2) | |
| South | 93 (24.7) | 67 (24.2) | 26 (26.3) | |
| West | 48 (12.8) | 36 (13.0) | 12 (12.1) | |
| Missing | 1 (0.3) | 1 (0.4) | 0 (0) | |
| Estimated patients seen in a typical week in primary setting – n (%) | ||||
| Responding physicians | 374 (99.5) | 275 (99.3) | 99 (100) | |
| Mean (SD) | 126 (84) | 124 (73) | 134 (109) | 0.39 |
| Median | 110 | 115 | 100 |
a
Optimistic physicians overestimated the actual percentage of their patients who were adherent by ≥10 points. All remaining physicians were considered non-optimistic.
b
Chi-square test (Fisher exact test if n < 5) was used for comparing categorical variables, Student t-test compared continuous variables between groups.