| | Large cell carcinoma (N = 1,319) | Small cell carcinoma (N = 10,582) | Adenocarcinoma (N = 67,649) | Squamous cell carcinoma (N = 22,951) | Other types of lung cancer (N = 21,647) |
| | Age (years) (mean ± standard deviation) | 65.66 ± 12.91 | 69.90 ± 11.00 | 66.43 ± 12.96 | 70.89 ± 11.13 | 72.07 ± 13.17 | | Sex | | Female | 393 | 29.8 | 1,150 | 10.87 | 33,584 | 49.64 | 2,940 | 12.81 | 6,936 | 32.04 | | Male | 926 | 70.2 | 9,432 | 89.13 | 34,065 | 50.36 | 20,011 | 87.19 | 14,711 | 67.96 | | Place of residence, no. (%) | | Urban | 660 | (50.04) | 4,953 | (46.81) | 36,765 | (54.35) | 10,020 | (43.66) | 9,789 | (45.22) | | Suburban | 394 | (29.87) | 3,170 | (29.96) | 19,560 | (28.91) | 7,424 | (32.35) | 6,325 | (29.22) | | Rural | 147 | (11.14) | 1,356 | (12.81) | 7,284 | (10.77) | 3,456 | (15.06) | 2,657 | (12.27) | | Unknown | 118 | (8.95) | 1,103 | (10.42) | 4,040 | (5.97) | 2,051 | (8.94) | 2,876 | (13.29) | | Income levels, no. (%) | | Quintile 1 | 176 | (13.34) | 1,668 | (15.76) | 7,817 | (11.56) | 3,388 | (14.76) | 3,487 | (16.11) | | Quintile 2 | 311 | (23.58) | 2,673 | (25.26) | 16,752 | (24.76) | 6,196 | (27.0) | 5,700 | (26.33) | | Quintile 3 | 157 | (11.9) | 1,458 | (13.78) | 8,354 | (12.35) | 3,406 | (14.84) | 2,815 | (13.0) | | Quintile 4 | 309 | (23.43) | 2,127 | (20.1) | 15,674 | (23.17) | 4,861 | (21.18) | 3,563 | (16.46) | | Quintile 5 | 253 | (19.18) | 1,568 | (14.82) | 15,277 | (22.58) | 3,120 | (13.59) | 3,251 | (15.02) | | Unknown | 113 | (8.57) | 1,088 | (10.28) | 3,775 | (5.58) | 1,980 | (8.63) | 2,831 | (13.08) | | Occupation, no. (%) | | Dependents of the insured individuals | 369 | (27.98) | 2,938 | (27.76) | 21,225 | (31.38) | 6,210 | (27.06) | 6,054 | (27.97) | | Civil servants, teachers, military personnel, and veterans | 50 | (3.79) | 446 | (4.21) | 3,379 | (4.99) | 1,050 | (4.57) | 951 | (4.39) | | Nonmanual workers and professionals | 100 | (7.58) | 450 | (4.25) | 6,468 | (9.56) | 939 | (4.09) | 1,033 | (4.77) | | Manual workers | 424 | (32.15) | 3,335 | (31.52) | 20,448 | (30.23) | 8,184 | (35.66) | 6,422 | (29.67) | | Other | 376 | (28.51) | 3,413 | (32.25) | 16,129 | (23.84) | 6,568 | (28.62) | 7,187 | (33.2) | | Charlson Index (mean ± standard deviation) | 3.58 ± 3.01 | 4.02 ± 3.14 | 3.68 ± 3.09 | 3.58 ± 2.86 | 4.29 ± 3.22 |
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