Association of smoking, alcohol drinking and dietary factors with esophageal cancer in high- and low-risk areas of Jiangsu Province, China

Table 2 OR¹ and 95% CI of socioeconomic status in EC of Dafeng and Ganyu

Socioeconomic status		Dafeng (high-risk)	Ganyu (low-risk)
Level of education
	Illiterate	1.00 (Referent)	1.00 (Referent)
	Primary school	0.54 (0.35-0.84)	0.58 (0.33-1.03)
	Secondary school & above	0.74 (0.39-1.41)	0.42 (0.21-0.83)
	P value for trend	0.08	0.008
Past economic status
	1 (lowest)	1.00 (Referent)	1.00 (Referent)
	2	0.67 (0.43-1.06)	1.03 (0.61-1.75)
	3	0.44 (0.28-0.68)	0.76 (0.44-1.31)
	4 (highest)	0.39 (0.23-0.65)	0.73 (0.41-1.28)
	P value for trend	<0.001	0.024
Encountered misfortune in past 10 yr
	No	1.00 (Referent)	1.00 (Referent)
	Yes	1.26 (0.80-1.98)	1.64 (0.98-2.73)
History of family cancer
	No	1.00 (Referent)	1.00 (Referent)
	Yes	1.53 (1.06-2.19)	2.07 (1.03-4.17)
Body mass index
	<18.5	1.00 (Referent)	1.00 (Referent)
	18.5-23.9	0.45 (0.26-0.76)	0.50 (0.28-0.90)
	23.9-27.9	0.26 (0.13-0.50)	0.36 (0.17-0.75)
	≥28	0.49 (0.18-1.33)	0.80 (0.33-1.98)
	P value for trend	0.002	0.376

¹ Matched by age and gender, further adjusted for education level and past economic status (quartile).