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Table 2 QUALICOPC patient respondents compared with patients in their physicians’ rosters, practice groups’ rosters, and Ontario

From: Assessing the representativeness of physician and patient respondents to a primary care survey using administrative data

  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
  1. SD standard deviation, COPD chronic obstructive pulmonary disease, CHF congestive heart failure
  2. aClarify that standardized differences >=0.2 are considered a meaningful difference and are highlighted in italics