Risk factors for primary liver carcinoma in Chinese population

Table 2 Summary of the association between factors and PLC

Factors	Total case/control	Combined OR	95%CI	χ2 (g = 1)	P
Liver diseases
HBV infection	3 390/4 604	11.34	8.72-14.75	327.60	0.000b
HCV infection	1 737/2 534	4.28	3.30-5.56	119.93	0.000b
Liver cirrhosis	1 689/2 609	11.97	6.19-23.19	54.46	0.000b
History of hepatitis	3 625/4 903	5.71	4.11-7.92	108.12	0.000b
Family history
Family history of PLC	3 681/4 932	3.49	2.68-4.53	87.24	0.000b
Psychological factors
Negative living events	1 688/2 096	2.65	1.69-4.15	17.90	0.000b
Unstable emotion	1 502/2 086	2.20	1.74-2.77	44.48	0.000b
Depressed character	1 355/1 777	3.07	2.10-4.47	33.99	0.000b
Past history of exposure to poison
Pesticide	755/969	1.55	0.82-2.93	1.84	0.175
Aflatoxin	327/327	1.80	1.44-2.25	26.90	0.000b
Living style
Alcoholic	3 207/3 983	1.88	1.53-2.32	35.60	0.000b
Smoking	2 408/3 347	1.24	1.09-1.41	10.90	0.001b
Intake of musty food	623/723	1.87	1.42-2.47	19.74	0.000b
Intake of pickle	1 233/1 602	1.69	1.34-2.13	47.56	0.000b
Intake of bean products	814/1 158	0.74	0.29-1.90	0.13	0.718
Tea	656/870	0.69	0.31-1.51	0.88	0.348
Drinking water from pond	1 561/1 614	1.77	1.09-2.87	8.65	0.003b
Drinking water from river	379/437	1.41	0.38-5.19	0.27	0.603
Drinking water from well	636/856	0.79	0.45-1.36	7.99	0.392

The values of c² shown are statistical values of significant test of combined OR.

^bP<0.01 vs significant difference.