Table 6. Hazard ratios (95% confidence intervals) of incident endometrial cancer according to the hours of physical exercise, walking and television viewing.

	Physical exercise, hour/week			P for trend
	Never	1 to 2	≥3
Number at risk	22,335	4,189	2,822
Person years	307,497	56,188	38,022
Number of cases	52	13	5
Model 1a	1.22 (0.71–2.11)	1	0.86 (0.32–2.34)	0.883
Model 2b	0.77 (0.42–1.43)	1	0.58 (0.21–1.64)	0.775

	Daily walking, hour/day			P for trend
	<0.5	0.5 to <1	≥1
Number at risk	2,769	11,164	13,803
Person years	37,302	141,860	188,400
Number of cases	9	26	32
Model 1a	1.49 (0.72–3.09)	1	1.05 (0.65–1.68)	0.539
Model 2b	1.37 (0.63–2.95)	1	1.07 (0.63–1.81)	0.712

	Television viewing, hour/day					P for trend
	<1	1 to <2	2 to <3	3 to <4	≥4
Number at risk	3,999	4,728	8,481	8,056	8,537
Person years	46,318	67,533	119,762	112,222	109,701
Number of cases	3	12	24	16	24
Model 1a	0.35 (0.10–1.24)	1	1.13 (0.57–2.26)	0.81 (0.38–1.71)	1.24 (0.61–2.52)	0.124
Model 2b	0.50 (0.13–1.92)	1	1.07 (0.54–2.15)	0.72 (0.34–1.53)	1.05 (0.51–2.15)	0.635

^aModel 1 adjusted for age.

^bModel 2 adjusted further for baseline body mass index, weight change since age 20, history of diabetes, history of hypertension, age at menarche, menstrual presence, parity, smoking status, alcohol consumption, occupational activity, hours of physical exercise, walking, and television viewing.