Table 4.

Interaction analysis and stratified analysis.

	Number of death	P	HRs(95%CI)**	Interaction P value
ESCC (n=537)
Age			0.926 (0.655-1.310)	0.793
<53	229	0.013*	1.398 (1.072-1.824)
≥53	308	0.062	1.246 (0.989-1.571)
Gender			1.407 (1.207- 1.987)	0.024*
Male	254	0.730	1.046 (0.810-1.352)
Female	283	< 0.001*	1.589 (1.249-2.021)
Smoking			0.691 (0.476-0.997)	0.025*
no	372	< 0.001*	1.526 (1.239-1.878)
yes	165	0.889	0.977 (0.710-1.346)
Alcohol drinking			0.741 (0.468-1.173)	0.166
no	448	0.001*	1.395 (1.154-1.686)
yes	89	0.856	1.041 (0.673-1.611)

P < 0.05* was considered statistically significant.

Multi-factor adjustment ** includes: gender, age(continuity), community, education level, number of siblings(continuity), BMI (continuity), smoking(classification), alcohol drinking(classification), fresh fruit intake, fresh vegetable intake, hot beverage intake, edible oil intake, meat intake and moldy staple food intake.

All food intake variables were converted into categorical ones.

ESCC, esophageal squamous cell carcinoma; HR,hazard ratio; 95%CI, 95% confidence interval.