Table 2.

The correlation between TV viewing/Computer use groups and outcomes (VD, all cause dementia, and AD)

Group	All cause dementia		AD		VD
	HR (95%CI)	P	HR (95%CI)	P	HR (95%CI)	P
TV viewing (h)
Model 1
≤ 1	Re		Re		Re
2–3	1.43(1.32–1.55)	< 0.001	1.48(1.31–1.67)	< 0.001	1.60(1.35–1.90)	< 0.001
≥ 4	2.64(2.44–2.85)	< 0.001	2.54(2.26–2.87)	< 0.001	3.19(2.69–3.78)	< 0.001
Model 2
≤ 1	Re		Re		Re
2–3	1.13(1.05–1.22)	< 0.01	1.15(1.02–1.30)	< 0.05	1.24(1.05–1.47)	< 0.001
≥ 4	1.52(1.41–1.64)	< 0.001	1.41(1.25–1.59)	< 0.001	1.77(1.49–2.09)	< 0.001
Model 3
≤ 1	Re		Re		Re
2–3	1.09(1.01–1.18)	< 0.05	1.12(0.99–1.26)	0.08	1.12(0.94–1.33)	0.202
≥ 4	1.29(1.19–1.40)	< 0.001	1.25(1.1–1.42)	< 0.001	1.24(1.04–1.49)	< 0.05
Computer use (h)
Model 1
≤ 1	Re		Re		Re
2–3	0.98(0.92–0.529)	0.53	0.88(0.79–0.97)	< 0.05	0.98(0.86–1.130)	0.82
≥ 4	0.81(0.81–0.91)	< 0.001	0.7(0.58–0.84)	< 0.001	0.97(0.77–1.2)	0.76
Model 2
≤ 1	Re		Re		Re
2–3	0.92(0.86–0.98)	< 0.01	0.84(0.76–0.94)	< 0.001	0.88(0.77–1.01)	0.07
≥ 4	1.02(0.91–1.15)	0.71	0.93(0.77–1.12)	0.44	1.18(0.94–1.47)	0.15
Model 3
≤ 1	Re		Re		Re
2–3	0.96(0.90–1.02)	0.21	0.9(0.81–1.00)	0.051	0.93(0.81–1.07)	0.31
≥ 4	1(0.89–1.12)	0.99	0.96(0.79–1.16)	0.65	1.11(0.88–1.39)	0.37

The Cox proportional risk models were applied to evaluate the HR of VD, AD, and all cause dementia. Model 1 was unadjusted; Model 2 was adjusted for sex and age; Model 3 was adjusted for education level, ethnicity, sex, age, alcohol use, BMI, TDI, smoking, MI, diabetes, stroke, and hypertension. AD Alzheimer's disease, VD vascular dementia, TDI Townsend deprivation index, MI myocardial infarction, BMI body mass index, RE reference