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Table 4 Results of mediation model examining effect of the intervention (baseline to 6 months) on ASI-12 and mental health outcomes at 6 months

From: Effect of a physical activity and sleep m-health intervention on a composite activity-sleep behaviour score and mental health: a mediation analysis of two randomised controlled trials

Outcome

A (SE)

B (SE)

Direct (SE)

C (SE)

AB (SE)[95%CI]

Depressive Symptoms

3.07 (0.92)a

−0.13 (0.03)a

−0.31 (0.43)

−0.71 (0.44)

− 0.40 (0.18) [− 0.86,-0.13]

Anxiety Symptoms

3.12 (0.93)a

− 0.09 (0.02)a

−0.17 (0.29)

− 0.46 (0.30)

−0.29 (0.13) [− 0.70,-0.12]

Stress Symptoms

3.08 (0.92)a

−0.18 (0.03)a

− 0.40 (0.40)

−0.96 (0.43)a

− 0.56 (0.21) [−1.08,-0.24]

QOL Physical Score

3.00 (0.92)a

0.09 (0.04)a

0.84 (0.51)

1.11 (0.51)a

0.27 (0.14) [0.08,0.65]

QOL Mental Score

3.07 (0.92)a

0.18 (0.05)a

−0.11 (0.66)

0.44 (0.66)

0.55 (0.24) [0.19,1.19]

Energy & Fatigue

3.04 (0.92)a

0.32 (0.09)a

2.50 (1.17)a

3.48 (1.18)a

0.99 (0.48) [0.30,2.22]

  1. In all models a path adjusted for study (Synergy, REFRESH) and baseline value of mediator, b path adjusted for study (Synergy, REFRESH) and baseline value of mediator and outcome. a indicates p < 0.05