Table 1 Characteristics of the Study Population
Lung cancer (N = 32759) | Non-lung cancer (N = 15186265) | p-value | |
|---|---|---|---|
Lung diseases (%) | |||
 Tuberculosis | 1052 (3.2) | 110469 (0.7) | < 0.001 |
 Asthma | 4380 (13.4) | 747889 (4.9) | < 0.001 |
 COPD | 7883 (24.1) | 1201101 (7.9) | < 0.001 |
Sex (%) | < 0.001 | ||
 Men | 22872 (69.8) | 7979664 (52.6) | |
 Women | 9887 (30.2) | 7206601 (47.4) | |
Age (years, %) | < 0.001 | ||
 20–39 | 1049 (3.2) | 7221512 (47.6) | |
 40–49 | 3580 (10.9) | 3464916 (22.8) | |
 50–59 | 5937 (18.1) | 2209547 (14.6) | |
 60–69 | 7374 (22.5) | 1036090 (6.8) | |
 70–79 | 10544 (32.2) | 823322 (5.4) | |
 ≧80 | 4275 (13.1) | 430878 (2.8) | |
Low income (%)a | 889 (2.7) | 245045 (1.6) | < 0.001 |
Comorbidities (%) | |||
 Diabetes | 5680 (17.3) | 1060714 (7.0) | < 0.001 |
 Hyperlipidemia | 5988 (18.3) | 1347931 (8.9) | < 0.001 |
 Chronic kidney disease | 961 (2.9) | 149730 (1.0) | < 0.001 |
 Smoking-related cancersb | 777 (2.4) | 103201 (0.7) | < 0.001 |
Geographical area (%) | < 0.001 | ||
 Taipei City | 9236 (28.2) | 4851844 (32.0) | |
 North | 3920 (12.0) | 1961790 (12.9) | |
 Central | 6393 (19.5) | 2936377 (19.3) | |
 South | 6614 (20.2) | 2366398 (15.6) | |
 Kaohsiung-Pingtung | 5489 (16.8) | 2628117 (17.3) | |
 East | 1107 (3.3) | 441739 (2.9) | |
Urbanization (%) | < 0.001 | ||
 High | 13889 (42.4) | 7519048 (49.5) | |
 Mid | 12338 (37.7) | 5575331 (36.7) | |
 Low | 6532 (19.9) | 2091866 (13.8) | |
Death in 2004–2008 (%) | 27718 (84.6) | 648922 (4.3) | < 0.001 |
Follow-up time | 84505 | 73801819 | |
 (person-year) | |||
Histologic type (%) | |||
 Squamous cell carcinoma | 6637 (20.3) | ||
 Adenocarcinoma | 15490 (47.3) | ||
 Small cell carcinoma | 3019 (9.2) | ||
 Large cell carcinoma | 240 (0.7) | ||
 Others | 7373 (22.5) |