Table 2 QUALICOPC patient respondents compared with patients in their physicians’ rosters, practice groups’ rosters, and Ontario
|  | Group 1: QUALICOPC patient respondents N = 1225 | Group 2: QUALICOPC physicians’ rosters N = 158,537 | Group 3: QUALICOPC physicians’ practice groups’ rosters N = 2,270,380 | Group 4: Ontario population, 10% simple random sample N = 831,056 | Standardized differencea | ||||
|---|---|---|---|---|---|---|---|---|---|
Group 2 vs. 1 | Group 3 vs. 1 | Group 4 vs. 1 | Group 3 vs. 2 | Group 4 vs. 2 | |||||
Sex, N (%) | |||||||||
 Female | 782 (63.8) | 88,682 (55.9) | 1244,3224 (54.8) | 420,085 (50.5) | 0.16 | 0.18 | 0.27 | 0.02 | 0.11 |
 Male | 443 (36.2) | 69,855 (44.1) | 1,026,056 (45.2) | 410,971 (49.5) | 0.16 | 0.18 | 0.27 | 0.02 | 0.11 |
Age, N (%) | |||||||||
 18–44 | 423 (34.5) | 69,786 (44.0) | 987,543 (43.5) | 385,125 (46.3) | 0.20 | 0.18 | 0.24 | 0.01 | 0.05 |
 45–64 | 492 (40.2) | 57,281 (36.1) | 829,440 (36.5) | 291,929 (35.1) | 0.08 | 0.07 | 0.10 | 0.01 | 0.02 |
 65+ | 310 (25.3) | 31,470 (19.9) | 453,397 (20.0) | 154,002 (18.5) | 0.13 | 0.13 | 0.16 | 0.00 | 0.03 |
Material deprivation quintile, N (%) | |||||||||
 1 (least deprived) | 303 (25.1) | 39,917 (25.7) | 561,391 (25.1) | 187,235 (22.9) | 0.01 | 0.00 | 0.05 | 0.01 | 0.06 |
 2 | 266 (22.0) | 33,362 (21.4) | 471,281 (21.1) | 162,865 (20.0) | 0.01 | 0.02 | 0.05 | 0.01 | 0.04 |
 3 | 208 (17.2) | 28,781 (18.5) | 421,191 (18.9) | 157,343 (19.3) | 0.03 | 0.04 | 0.05 | 0.01 | 0.02 |
 4 | 219 (18.1) | 27,392 (17.6) | 405,012 (18.1) | 149,790 (18.4) | 0.01 | 0.00 | 0.01 | 0.01 | 0.02 |
 5 (most deprived) | 211 (17.5) | 26,084 (16.8) | 373,716 (16.7) | 158,614 (19.4) | 0.02 | 0.02 | 0.05 | 0.00 | 0.07 |
Rurality Index of Ontario, N (%) | |||||||||
 < 10 (least rural) | 795 (64.9) | 104,620 (66.0) | 1,688,247 (74.4) | 608,395 (73.2) | 0.02 | 0.21 | 0.18 | 0.18 | 0.16 |
 10–40 | 316 (25.8) | 39,638 (25.0) | 463,532 (20.4) | 155,884 (18.8) | 0.02 | 0.13 | 0.17 | 0.11 | 0.15 |
 40+ (most rural) | 114 (9.3) | 14,279 (9.0) | 118,601 (5.2) | 66,777 (8.0) | 0.01 | 0.16 | 0.05 | 0.15 | 0.03 |
Resource utilization bands, N (%) | |||||||||
 0 (non-user) | 22 (1.8) | 8856 (5.6) | 133,031 (5.9) | 92,008 (11.1) | 0.20 | 0.21 | 0.38 | 0.01 | 0.20 |
 1 (healthy user) | 35 (2.9) | 8746 (5.5) | 120,487 (5.3) | 49,519 (6) | 0.13 | 0.12 | 0.15 | 0.01 | 0.02 |
 2 (low morbidity) | 87 (7.1) | 26,594 (16.8) | 376,574 (16.6) | 141,200 (17) | 0.30 | 0.30 | 0.31 | 0.01 | 0.01 |
 3 (moderate morbidity) | 662 (54.0) | 81,632 (51.5) | 1,185,228 (52.2) | 397,248 (47.8) | 0.05 | 0.04 | 0.13 | 0.01 | 0.07 |
 4 (high morbidity) | 292 (23.8) | 24,256 (15.3) | 339,211 (14.9) | 111,158 (13.4) | 0.22 | 0.23 | 0.27 | 0.01 | 0.05 |
 5 (very high morbidity) | 127 (10.4) | 8453 (5.3) | 115,849 (5.1) | 39,923 (4.8) | 0.19 | 0.20 | 0.21 | 0.01 | 0.02 |
Chronic disease, N (%) | |||||||||
 Asthma | 255 (20.8) | 22,792 (14.4) | 329,256 (14.5) | 112,173 (13.5) | 0.17 | 0.17 | 0.20 | 0.00 | 0.03 |
 COPD | 56 (4.6) | 4285 (2.7) | 61,555 (2.7) | 21,446 (2.6) | 0.10 | 0.10 | 0.11 | 0.00 | 0.01 |
 CHF | 44 (3.6) | 3523 (2.2) | 51,127 (2.3) | 18,228 (2.2) | 0.08 | 0.08 | 0.08 | 0.00 | 0.00 |
 Hypertension | 446 (36.4) | 43,269 (27.3) | 640,891 (28.2) | 213,398 (25.7) | 0.20 | 0.18 | 0.23 | 0.02 | 0.04 |
 Diabetes | 206 (16.8) | 18,653 (11.8) | 277,755 (12.2) | 93,806 (11.3) | 0.14 | 0.13 | 0.16 | 0.01 | 0.01 |
Healthcare visits in the last year, mean (SD) | |||||||||
 Primary care | 5.83 (6.24) | 3.46 (4.08) | 3.69 (4.32) | 3.33 (4.38) | 0.45 | 0.40 | 0.46 | 0.05 | 0.03 |
 Emergency department | 0.58 (1.23) | 0.44 (1.23) | 0.40 (1.15) | 0.42 (1.25) | 0.12 | 0.16 | 0.13 | 0.03 | 0.01 |
 Acute care | 0.12 (0.47) | 0.08 (0.36) | 0.08 (0.36) | 0.07 (0.36) | 0.10 | 0.11 | 0.12 | 0.01 | 0.02 |