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Table 2 Characteristics of occupational lung cancer cases recognized by the KWCWS

From: Silica exposure and work-relatedness evaluation for occupational cancer in Korea

Variables Classification Frequency (%)
Age Less than 40 years 2 (1.7)
40–49 years 9 (7.5)
50–59 years 36 (30.0)
60–69 years 35 (29.2)
More than 70 years 38 (31.7)
Sex Male 120 (100)
Female 0 (0)
Smoking history None 17 (14.2)
Less than 20PY 33 (27.5)
More than 20PY 63 (52.5)
Unknown 7 (5.8)
Industries Mining 45 (37.5)
Stone quarrying, processing 13 (10.8)
Foundry work 10 (8.3)
Construction 13 (10.8)
Subway work 8 (6.7)
Painting or paint manufacturing 9 (7.5)
Horse training 4 (3.3)
Briquetting 4 (3.3)
Car repair 2 (1.7)
Fireproof material work 2 (1.7)
Others 10 (8.3)
Pneumoconiosis Yes 23 (19.2)
No 97 (80.2)
Lag time Less than 10 years 0 (0)
10–19 years 15 (12.5)
20–29 years 20 (16.7)
30–39 years 37 (30.8)
More than 40 years 48 (40.0)