Table 4 Baseline and post-intervention, adjusted difference and effect sizes for potential mediators outcomes

Amount of time parent believes is acceptable for EM use (mins/day)

81.0 (48.9, 113.1)

84.0 (49.2, 118.8)

66.0 (43.8, 88.2)

70.9 (48.3, 93.5)

4.9 (−21.0, 30.7)

0.17

0.09

Weekly frequency young child watches TV/DVD/videos to settle for bed (days/week)

1.9 (0.0, 3.7)

3.0 (0.7, 5.2)

2.3 (17.6, 4.3)

2.6 (0.5, 4.7)

−0.6 (−2.0, 0.8)

0.39

0.22

Parent feels they can support active opportunities (possible range 0–4)#

3.2 (2.7, 3.7)

3.5 (3.3, 3.7)

3.4 (3.0, 3.8)

3.6 (3.3, 3.8)

−0.1 (−0.3, 0.1)

0.36

0.20

Parent believes it is important to participate in activities together (possible range 0–4)#

1.3 (1.0, 1.7)

1.7 (1.3, 2.1)

1.4 (1.1, 1.7)

1.6 (1.1, 2.1)

0.0 (−0.5, 0.5)

0.05

0.03

Parental self-efficacy to limit child’s EM use (possible range 0–4)#

2.4 (2.0, 2.8)

2.5 (2.0, 3.1)

2.6 (2.2, 3.0)

2.8 (2.4, 3.3)

0.1 (−0.2, 0.5)

0.31

0.17

Parental beliefs about influence of EM use on health, developmental and behavioural outcomes (possible range 0–4)^

2.1 (1.7, 2.4)

2.0 (1.7, 2.4)

2.2 (1.9, 2.5)

2.4 (2.1, 2.8)

0.3 (−0.2, 0.7)

0.55

0.31

Child’s opportunity to participate in EM use (possible range 0–4)~

1.5 (1.3, 1.7)

1.7 (1.5, 2.0)

1.5 (1.3, 1.6)

1.6 (1.4, 1.8)

0.0 (−0.2, 0.2)

0.12

0.07

Percent of time sitting

54.4 (47.7, 61.2)

54.2 (48.9, 49.5)

54.8 (45.5, 64.0)

54.1 (49.7, 58.5)

1.0 (−7.7, 9.7)

0.11

0.06

Percent of time standing

30.3 (25.0, 35.5)

30.7 (27.0, 34.3)

30.8 (21.5, 40.1)

30.3 (27.8, 32.7)

1.6 (−6.9, 10.1)

0.18

0.10

Percent of time stepping

15.3 (13.2, 17.4)

15.2 (11.8, 18.7)

14.5 (11.0, 17.9)

15.7 (11.8, 19.6)

1.3 (−2.6, 5.3)

0.31

0.18