Table 5. HRs for all cancers associated with a two-point increment of the Mediterranean diet score for each category of tobacco smoking status.

	Cases	HRa (95% CI)
All cancers	30 731	0.96 (0.95–0.98)
Never smokers	13 787	0.98 (0.96–1.00)
Former smokers	8860	0.96 (0.93–0.98)
Current smokers	7439	0.94 (0.91–0.97)
	P for heterogeneity=0.07
Cancers known to be related to smoking b , c	8000	0.92 (0.89–0.94)
Never smokers	2392	0.95 (0.90–0.99)
Former smokers	2490	0.93 (0.89–0.98)
Current smokers	3009	0.88 (0.84–0.92)
	P for heterogeneity=0.04
Cancers not known to be associated with smoking c , d	11 218	0.98 (0.96–1.01)
Never smokers	5645	0.97 (0.94–1.01)
Former smokers	3205	0.99 (0.94–1.03)
Current smokers	2104	0.99 (0.94–1.04)
	P for heterogeneity=0.73

Abbreviations: CI=confidence interval; HR=hazard ratio.

^aStratified by centre and sex, and adjusted for duration of smoking, smoking status, education, height, body mass index, total energy intake, physical activity, age at menarche, parity, menopausal status, oral contraceptive and hormone therapy use.

^bSmoking-associated cancers include cancers of the lung, kidney, upper aero-digestive tract, stomach, pancreas, bladder, liver and colorectal.

^cP for heterogeneity of smoking unrelated cancers vs smoking related cancers=0.0008

^dSmoking-unrelated cancers include cancers of the breast, prostate, and endometrium.