Table 1.

Summary table of the prospective associations between day-time napping and risk of disease and death in the EPIC-Norfolk population cohort of men and women^a

Outcome	Groups	Sample size	Relative risk	95% C.I.
Type-2 diabetes [48]	No napping	9613	Ref
	Napping	3851	1.30	1.01–1.69
Respiratory disease [49•]	No napping	7878	Ref
	Nap < 1 h	2831	1.32	1.15–1.52
	Nap ≥ 1 h	269	1.54	1.14–2.09
Chronic lower respiratory disease [49•]	No napping	7878	Ref
	Nap < 1 h	2831	1.52	1.18–1.96
	Nap ≥ 1 h	269	1.72	1.01–2.92
All-cause mortality [47]	No napping	11,493	Ref
	Nap < 1 h	4412	1.14	1.02–1.27
	Nap ≥ 1 h	469	1.32	1.04–1.68

^aResults are expressed as relative risk (95% confidence intervals) between napping and reference category