Table 3 Socio-demographic, behavioural and health factors associated with changes in mean TV viewing time (in hours) between baseline and 2-year follow-up ( N = 6,090)

Socioeconomic status*

Managerial/ professional

2226

Reference

Reference

Intermediate

1580

0.41 (0.16, 0.66)

0.36 (0.11, 0.60)

Manual/routine

2236

1.31 (1.08, 1.54)

1.12 (0.89, 1.36)

Other

48

-

-

p-trend

<0.001

<0.001

Depression (CES-D ≥ 4)

No

5378

Reference

Reference

Yes

712

0.81 (0.51, 1.11)

0.43 (0.12, 0.74)

p-trend

<0.001

0.007

Disability

No

4817

Reference

Reference

Yes

1273

0.69 (0.45, 0.94)

0.25 (−0.01, 0.52)

p-trend

<0.001

0.06

Chronic illness

No

2924

Reference

Reference

Yes

3166

0.27 (0.08, 0.46)

−0.04 (−0.24, 0.17)

p-trend

0.007

0.73

Body mass index

15 - 25

1631

Reference

Reference

≥25 < 30

2559

0.37 (0.13, 0.61)

0.43 (0.19, 0.66)

≥30

1900

0.91 (0.65, 1.16)

0.82 (0.56, 1.08)

p-trend

<0.001

<0.001

Physical activity

Inactive

1085

Reference

Reference

Moderate

3017

−0.95 (−1.22, −0.68).

−0.65 (−0.92, −0.37)

Vigorous

1988

−1.07 (−1.36, −.077)

−0.57 (−0.78, −0.26)

p-trend

<0.001

<0.001

Smoking

Never

2503

Reference

Reference

Ex-smoker

2849

0.09 (−0.12, 0.30)

0.02 (−0.19, 0.23)

Current

738

0.93 (0.61, 1.25)

0.71 (0.39, 1.03)

p-trend

<0.001

<0.001