Table 3.

Competing risk and Cox proportional hazard regression analyses for total cancer mortality among DM and smoking status categories

	Competing risk			Cox proportional hazard
	SHR	95 % CI	p value	HR	95 % CI	p value
NDM and never smoker (n = 185)	1.00 (ref)	–	–	1.00 (ref)	–	–
NDM and ex-smoker (n = 150)	2.42	0.71–8.17	0.157	2.36	0.72–7.74	0.155
NDM and current smoker (n = 390)	5.01	1.77–14.21	0.002	4.89	1.72–13.91	0.003
DM and never smoker (n = 15)	2.77	0.27–28.42	0.391	2.54	0.28–23.10	0.406
DM and ex-smoker (n = 21)	6.06	1.39–26.51	0.017	7.88	1.91–32.55	0.004
DM and current smoker (n = 29)	10.12	2.69–38.07	<0.001	10.61	2.99–37.66	<0.001

Both HR and SHR were adjusted for age, body mass index, alcohol drinking and total cholesterol level

DM type 2 diabetes, NDM non-DM, SHR subhazard ratio assessed by competing risk regression, HR hazard ratio assessed by Cox proportional hazard model, 95 % CI 95 % confidence interval