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Table 1 Selected Baseline Characteristics of the Study Participants

From: Current lung cancer screening guidelines may miss high-risk population: a real-world study

Parameter Male, n (%) Female, n (%) Total, n (%)
Total 9801 (61.3) 6195 (38.7) 15,996 (100.0)
Age at inclusion (years)a 51.26 ± 14.76 48.80 ± 14.76 50.31 ± 14.81
< 30 545 (5.56) 586 (9.5) 1131 (7.0)
30~ 1361 (13.9) 872 (14.1) 2233 (14.0)
40~ 3119 (31.8) 2224 (35.9) 5343 (33.4)
50~ 2363 (24.1) 1196 (19.3) 3559 (22.2)
60~ 1033 (10.5) 605 (9.8) 1638 (10.2)
70~ 832 (8.5) 475 (7.7) 1307 (8.2)
≥80 548 (5.6) 237 (3.8) 785 (5.0)
Smoking status
 smoking 4697 (47.9) 52 (0.8) 4749 (29.7)
 non-smoking 5104 (52.1) 6143 (99.2) 11,247 (70.3)
 Smoking volume (pack year)a 19.24 ± 14.84 13.95 ± 25.04 19.20 ± 14.93
 < 10 894 (19.0) 13 (25.0) 907 (19.1)
 10~ 1080 (23.0) 8 (15.4) 1088 (23.0)
 20~ 841 (17.9) 1 (1.9) 842 (17.7)
 30~ 488 (10.4) 1 (1.9) 489 (10.3)
 40~ 225 (4.8) 0 (0) 225 (4.7)
 50~ 45 (1.0) 0 (0) 45 (0.9)
 ≥60 100 (2.1) 1 (1.9) 101 (2.1)
 Unknown 1024 (21.8) 28 (53.8) 1052 (22.2)
Family history of lung cancer
 Yes 163 (87.2) 181 (84.6) 401 (2.5)
 No 24 (12.8) 33 (15.4) 15,595 (97.5)
Chronic lung diseaseb
 Yes 5868 (59.9) 3450 (55.7) 9318 (58.3)
 No 3933 (40.1) 2745 (44.3) 6678 (41.7)
  1. a Values are presented as mean ± SD (range). b Chronic lung diseases include the chronic obstructive pulmonary disease, diffuse pulmonary fibrosis, history of pulmonary tuberculosis and other respiratory diseases