Table 3.

Risk of Prostate Cancer According to Categories of Television or Video Viewing Among 170,481 Men in the NIH-AARP Diet and Health Study, 1996 – 2006

	Cases	Person years	Multivariable adjusted
			HR	95% CI
Total prostate cancer
< 1 h/day	864	94,369	1.00
1 – 2 h/day	4193	438771	1.01	0.94, 1.09
3 – 4 h/day	6224	649360	1.01	0.94, 1.08
5 – 6 h/day	1930	205797	0.98	0.91, 1.07
≥ 7 h/day	540	58172	1.03	0.92, 1.15
P trend			0.53
By body mass index category (interaction term: p=0.02)
18.5 – 24.9 kg/m2
< 1 h/day	397	41537	1.00
1 – 2 h/day	1541	151049	1.01	0.90, 1.13
3 – 4 h/day	1907	184951	1.01	0.90, 1.13
5 – 6 h/day	482	51043	0.92	0.80, 1.05
≥ 7 h/day	108	13667	0.82	0.66, 1.01
P trend			0.04
25.0 – 29.9 kg/m2
< 1 h/day	386	41823	1.00
1 – 2 h/day	2057	216731	1.00	0.89, 1.11
3 – 4 h/day	3215	330940	1.00	0.90, 1.11
5 – 6 h/day	978	101110	0.98	0.87, 1.11
≥ 7 h/day	259	26226	1.04	0.89, 1.22
P trend			0.98
≥ 30.0 kg/m2
< 1 h/day	76	10581	1.00
1 – 2 h/day	576	69501	1.13	0.89, 1.44
3 – 4 h/day	1078	131350	1.10	0.87, 1.39
5 – 6 h/day	466	52932	1.16	0.91, 1.48
≥ 7 h/day	170	18058	1.28	0.98, 1.69
P trend			0.11
Advanced prostate cancer
< 3 h/day	512	533141	1.00
3 – 4 h/day	613	649360	0.97	0.86, 1.10
≥ 5 h/day	240	263969	0.93	0.79, 1.09
P trend			0.49
By body mass index category (interaction term: p=0.84)
18.5 – 24.9 kg/m2
< 3 h/day	191	192586	1.00
3 – 4 h/day	174	184951	0.95	0.77, 1.18
≥ 5 h/day	55	64710	0.86	0.63, 1.17
P trend			0.44
25.0 – 29.9 kg/m2
< 3 h/day	252	258555	1.00
3 – 4 h/day	309	330940	0.94	0.79, 1.11
≥ 5 h/day	112	127336	0.88	0.70, 1.11
P trend			0.27
≥ 30.0 kg/m2
< 3 h/day	64	80083	1.00
3 – 4 h/day	126	131350	1.18	0.87, 1.59
≥ 5 h/day	72	70991	1.22	0.86, 1.73
P trend			0.22
Prostate cancer mortality
< 3 h/day	205	533141	1.00
3 – 4 h/day	320	649360	1.10	0.92, 1.32
≥ 5 h/day	144	263969	1.07	0.85, 1.33
P trend			0.15
By body mass index category (interaction term: p=0.67)
18.5 – 24.9 kg/m2
< 3 h/day	71	192586	1.00
3 – 4 h/day	82	184951	1.01	0.73, 1.39
≥ 5 h/day	28	64710	0.83	0.53, 1.30
P trend			0.96
25.0 – 29.9 kg/m2
< 3 h/day	102	258555	1.00
3 – 4 h/day	171	330940	1.17	0.91, 1.50
≥ 5 h/day	62	127336	0.99	0.72, 1.38
P trend			0.59
≥ 30.0 kg/m2
< 3 h/day	31	80083	1.00
3 – 4 h/day	66	131350	1.13	0.74, 1.74
≥ 5 h/day	54	70991	1.52	0.97, 2.40
P trend			0.03

^aModels are adjusted for age at baseline, age squared, race, marital status, highest level of education, family history of prostate cancer, digital rectal examination in past three years, prostate specific antigen test in past three years, history of diabetes, smoking status, caloric intake, alcohol intake, recreational moderate- to vigorous-intensity physical activity, body mass index at baseline (not models stratified by body mass index).