Characteristic | Overall Population (N = 2514) | Prior Diagnosis COPD (N = 527) | No Prior Diagnosis COPD (N = 1987) | p-value* |
---|---|---|---|---|
Age, mean (std dev) | 62.3 (5.8) | 62.1 (6.1) | 62.4 (5.8) | 0.38 |
Gender, male, N (%) | 1391 (55.3) | 253 (48.0) | 1138 (57.3) | < 0.001 |
Education < secondary | 405 (16.1) | 117 (22.2) | 288 (14.5) | < 0.001 |
 -secondary school | 924 (36.8) | 191 (36.3) | 733 (36.9) |  |
 -post-secondary | 1185 (47.1) | 219 (41.6) | 966 (48.6) |  |
Pack Years, mean (range) | 50 (2.2, 230) | 52.5 (2.4, 230) | 50 (2.2, 169) | < 0.001 |
Lung Cancer Risk mean (range) | 3.4 (2.0, 38.2) | 4.4 (2.0, 34.4) | 3.2 (2.0, 38.2) | < 0.001 |
Current Smoker, n (%) | 1566 (62.3) | 305 (57.9) | 1261 (63.5) | 0.020 |
Dyspnea, n (%) | 1133 (45.1) | 394 (74.8) | 739 (37.2) | < 0.001 |
Cough, n (%) | 1316 (52.4) | 361 (68.5) | 955 (48.1) | < 0.001 |
Phlegm, n (%) | 1161 (46.2) | 329 (62.4) | 832 (41.9) | < 0.001 |
Wheeze, n (%) | 943 (37.5) | 316 (60.0) | 627 (31.6) | < 0.001 |
Any High Risk Occupation, n (%) | 884 (35.2) | 198 (37.6) | 686 (34.5) | 0.20 |
CXR within 3 years = 0 | 1017 (40.5) | 121 (23.0) | 896 (45.1) | < 0.001 |
 = 1 | 891 (35.4) | 212 (40.2) | 679 (34.2) |  |
 ≥ 2 | 606 (24.1) | 194 (36.8) | 412 (20.7) |  |
CT within 3 years = 0 | 2441 (97.1) | 512 (97.2) | 1929 (97.1) | 0.86 |
 = 1 | 68 (2.7) | 13 (2.5) | 55 (2.8) |  |
 = 2 | 5 (0.2) | 2 (0.4) | 3 (0.2) |  |
Asthma, n (%) | 244 (9.7) | 117 (22.2) | 127 (6.4) | < 0.001 |
Pulmonary Fibrosis, n (%) | 3 (0.1) | 1 (0.2) | 2 (0.1) | 0.51 |
Pneumonia, n (%) | 672 (26.7) | 225 (42.7) | 447 (22.5) | < 0.001 |
Respiratory Failure, n (%) | 11 (0.4) | 8 (1.5) | 3 (0.2) | < 0.001 |