Habitual sleep duration, healthy eating, and digestive system cancer mortality

Table 2 Joint effects of sleep duration and diet on digestive cancer mortality

			Joint analysis		Stratified analysis
Sleep duration	Diet	N	HR (95% CI)	P-value	HR (95% CI)	P-value
Recommended	Healthy diet	120,622	0.78 (0.71–0.86)	< 0.001	0.86 (0.77–0.97)	< 0.001
Recommended	Unhealthy diet	157,577	0.89 (0.82–0.97)	0.007	Ref
Outside recommended range	Healthy diet	54,298	0.84 (0.76–0.94)	0.003	0.87 (0.80–0.94)	< 0.001
Outside recommended range	Unhealthy diet	74,087	Ref		Ref
Recommended	Fruits and vegetables: high intake	161,158	0.79 (0.72–0.87)	< 0.001	0.88 (0.79–0.98)	0.002
Recommended	Fruits and vegetables: low intake	117,041	0.88 (0.80–0.98)	0.015	Ref
Outside recommended range	Fruits and vegetables: high intake	73,374	0.86 (0.77–0.95)	0.005	0.88 (0.82–0.96)	0.002
Outside recommended range	Fruits and vegetables: low intake	55,011	Ref		Ref
Recommended	Meat: low intake	193,513	0.81 (0.73–0.90)	< 0.001	0.92 (0.83–1.03)	0.163
Recommended	Meat: high intake	84,686	0.92 (0.83–1.03)	0.134	Ref
Outside recommended range	Meat: low intake	87,576	0.90 (0.81–1.01)	0.072	0.87 (0.80–0.95)	0.001
Outside recommended range	Meat: high intake	40,809	Ref		Ref
Recommended	Fibre: high intake	12,781	0.74 (0.60–0.90)	0.002	0.85 (0.67–1.09)	0.207
Recommended	Fibre: low intake	265,418	0.91 (0.85–0.97)	0.004	Ref
Outside recommended range	Fibre: high intake	6690	0.86 (0.67–1.10)	0.220	0.82 (0.67–0.99)	0.041
Outside recommended range	Fibre: low intake	121,695	Ref		Ref

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