Table 2. The association between TV time, internet use and muscle strength indicators in men (N = 2845).

Sedentary exposure	N	Age adjustedB* (95% CI)	MultivariateB* (95% CI)	Age adjustedB* (95% CI)	MultivariateB* (95% CI)
TV time		Hand grip (Kg)		Chair stand time (secs)
<2 hrs/d	349	Reference	Reference	Reference	Reference
2<4 hrs/d	1055	−0.54 (−1.54, 0.46)	−0.58 (−1.55, 0.39)	−0.04 (−0.48, 0.39)	−0.20 (−0.62, 0.22)
4<6 hrs/d	724	−0.73 (−1.79, 0.32)	−0.27 (−1.30, 0.77)	0.24 (−0.22, 0.70)	−0.25 (−0.70, 0.20)
≥6 hrs/d	717	−2.47 (−3.52, −1.41)	−1.20 (−2.26, −0.14)	0.65 (0.18, 1.12)	−0.08 (−0.54, 0.39)
p-trend		<0.001	0.076	0.001	0.62
Internet usage
No	1007	Reference	Reference	Reference	Reference
Yes	1838	3.25 (2.58, 3.92)	2.43 (1.74, 3.12)	−0.84 (−1.14, −0.54)	−0.44 (−0.75, −0.13)
p-trend		<0.001	<0.001	<0.001	0.005

Multivariate model includes adjustments for age, smoking, physical activity, alcohol, social class, disability, chronic illness, body mass index, CES-D score, and mutually for TV time or internet use.

^*General linear model coefficients; coefficients indicate mean differences (in muscle strength markers) between each screen time group and the reference category.