Example Table. Exposure among Liver Cirrhosis Cases and Controls

	Cases (n-40)	Controls (n-139)
Vinyl chloride monomer (cumulative exposure: ppm × years)
<160	7 (18%)	38 (27%)
160-500	7 (18%)	40 (29%)
500-2500	9 (23%)	37 (27%)
>2500	17 (43%)	24 (17%)
Alcohol consumption (g/day)
<30	1 (3%)	82 (59%)
30-60	7 (18%)	46 (33%)
>60	32 (80%)	11 (8%)
HBsAG/HCV
Negative	33 (83%)	136 (98%)
Positive	7 (18%)	3 (2%)

HBsAG, hepatitis B surface antigen; HCV, hepatitis C virus. Table adapted from Mastrangelo et al. [151].