Table 3.

Demographic and occupational characteristics according to stage of pneumoconiosis*

	Stage 0 and I n = 401	Stage II n = 121	Stage III n = 17	p
Age at first diagnosis
≤44 45–59 ≥60	279 (76.8%) 104 (70.7%) 18 (62.1%)	74 (20.4%) 37 (25.2%) 10 (34.5%)	10 (2.8%) 6 (4.1%) 1 (3.4%)	0.109
Type of disease
Silicosis Mix dust pneumoconiosis Coal worker pneumoconiosis Asbestosis Other	268 (73.8%) 103 (73.1%) 20 (95.2%) 0 10 (76.9%)	82 (22.6%) 34 (24.1%) 1 (4.8%) 1 3 (%23.1)	13 (3.6%) 4 (2.8%) 0 0 0	0.766
Total Dust Exposure (Years)
≤5 6–14 ≥15	43 (71.7%) 116 (76.8%) 242 (73.8%)	16 (26.7%) 30 (19.9%) 75 (22.9%)	1 (1.7%) 5 (3.3%) 11 (3.4%)	0.852

Note: Row percentage is presented