Skip to main content

Table 3 Causal mediation analyses – decomposition of total effect of DSME intervention on MCS-12 change into direct and indirect effects

From: Effect of a community-based diabetes self-management empowerment program on mental health-related quality of life: a causal mediation analysis from a randomized controlled trial

Possible Mediator

Direct Effect

Indirect Effect

Total Effect*

Mediator of main interest

   

HbA1c (change score)

1.7 (0.2 to 3.2)

−0.1 (−0.4 to 0.1)

1.6 (0.1 to 3.1)

Other possible mediators

   

Social support score from Diabetes Care Profile (change score)

1.6 (0.1 to 3.2)

0.1 (−0.1 to 0.3)

1.7 (0.2 to 3.3)

Participants’ perception of empowerment resulting from program (score obtained at follow-up period)

1.5 (0.0 to 3.2)

0.1 (−0.1 to 0.4)

1.7 (0.2 to 3.3)

  1. *Total effect and 95% CI in each analysis were slightly different because each analysis has different missing samples. Total effect does not always appear to be the sum of direct effect and indirect effect due to rounding.
  2. DSME: diabetes self-management education, MCS-12: mental component summary score of SF-12, HbA1c: hemoglobin A1c.