Table 3.

Logistic regression analysis of cigarette smoking, alcohol drinking and betel quid (BQ) chewing with incidence of p53 mutations in male patients with esophageal squamous cell carcinoma

Potential risk factor	Relative risk	95% CI	P
BQ chewing	3.066	1.159–8.114	0.024
Cigarette smoking	1.615	0.355–7.399	0.535
Alcohol drinking	1.015	0.366–2.817	0.977
Cigarette smoking †
BQ chewing	3.014	1.118–8.129	0.029
Alcohol drinking †
BQ chewing	4.286	1.338–13.731	0.014
Alcohol drinking †
Cigarette smoking †
BQ chewing	4.233	1.317–13.603	0.015
BQ chewing †
Alcohol drinking †
Cigarette smoking	1.555	0.304–7.956	0.596
Cigarette smoking †
BQ chewing †
Alcohol drinking	0.430	0.115–1.610	0.210

^† Controlled factors in logistic regression analysis; CI, confidence interval.