Table 1

Distribution of demographic factors, smoking, and occupational exposure to PAHs and aromatic amines among cases and controls

Cases (%) (n = 201)Controls (%) (n = 214)
Age (yrs)
 ≤408 (4)10 (5)
 41–5016 (8)18 (8)
 51–6049 (25)50 (23)
 61–7071 (35)81 (38)
 >7056 (28)55 (26)
Education
 None or elementary110 (55)114 (54)
 Middle school61 (31)50 (24)
 High school23 (12)38 (18)
 University6 (3)10 (5)
Smoking status
 Never smoker17 (8)53 (25)
 Light smoker55 (27)79 (37)
 Heavy smoker129 (64)82 (38)
Exposure to PAHs
 Never124 (62)141 (66)
 Ever77 (38)73 (34)
Exposure to aromatic amines
 Never183 (91)202 (94)
 Ever18 (9)12 (6)