Table 2: Demographic and clinical characteristics of patients of physicians in the QIIP and control groups.
| Characteristic | No. (%) of patients* | |
|---|---|---|
| QIIP group n = 78 192 |
Control group n =1 661 152 |
|
| Male sex | 37 061 (47.4) | 773 869 (46.6) |
| Health card registration within 10 yr of baseline | 2431 (3.1) | 70 507 (4.2) |
| Age, yr | ||
| ≤ 4 | 3797 (4.8) | 87 171 (5.2) |
| 5-9 | 4242 (5.4) | 90 263 (5.4) |
| 10-18 | 9386 (12.0) | 194 222 (11.7) |
| 19-34 | 13 713 (17.5) | 314 618 (18.9) |
| 35-49 | 17 421 (22.3) | 374 856 (22.6) |
| 50-64 | 17 062 (21.8) | 336 481 (20.2) |
| 65-74 | 6653 (8.5) | 136 228 (8.2) |
| 75-84 | 4421 (5.6) | 93 977 (5.6) |
| ≥ 85 | 1497 (1.9) | 33 336 (2.0) |
| Rurality Index of Ontario category | ||
| Major urban (1-9) | 38 688 (49.5) | 883 085 (53.2) |
| Suburban (10-39) | 22 644 (29.0) | 502 829 (30.3) |
| Rural (≥ 40) | 14 148 (18.1) | 250 538 (15.1) |
| Missing | 2712 ( .5) | 24 700 (1.5) |
| Income quintile | ||
| 1 (low) | 13 171 (16.8) | 288 115 (17.3) |
| 2 | 14 218 (18.2) | 318 724 (19.2) |
| 3 | 14 925 (19.1) | 330 089 (19.9) |
| 4 | 17 296 (22.1) | 358 818 (21.6) |
| 5 (high) | 18 062 (23.1) | 351 419 (21.2) |
| Missing | 520 (0.7) | 13 987 (0.8) |
| Diagnosis | ||
| Diabetes | 6225 (8.0) | 129 523 (7.8) |
| Previous acute myocardial infarction | 1090 (1.4) | 23 082 (1.4) |
| Asthma | 10 539 (13.5) | 223 053 (13.4) |
| Chronic heart failure | 1602 (2.0) | 32 455 (2.0) |
| Chronic obstructive pulmonary disorder | 5462 (7.0) | 105 023 (6.3) |
| Hypertension | 16 859 (21.6) | 352 751 (21.2) |
| Mental health disorder | 15 295 (19.6) | 316 221 (19.0) |
| Adjusted Diagnosis Group | ||
| 0 | 4538 (5.8) | 94 961 (5.7) |
| 1-5 | 41 814 (53.5) | 871 048 (52.4) |
| 6-9 | 26 956 (34.5) | 587 558 (35.4) |
| ≥ 10 | 4884 (6.2) | 107 585 (6.5) |
| Resource Utilization Band, mean ± SD | 2.62 ± 1.10 | 2.63 ± 1.10 |
Note: QIIP = Quality Improvement and Innovation Partnership, SD = standard deviation.
*Except where noted otherwise.