Table 8. Planned mediation analysis of mindfulness change on the intervention-cognitive anxiety pathway.
Path Coefficient SE t p-value 95% CI
Total Effect (c) -8.41 1.05 -8.01 < .001 [-10.49, -6.33]
Path a (IV → Mediator) 26.40 2.89 9.13 < .001 [20.67, 32.13]
Path b (Mediator → DV) -0.15 0.04 -3.56 < .001 [-0.23, -0.06]
Direct Effect (c') -4.54 1.12 -4.05 < .001 [-6.76, -2.32]
Indirect Effect (ab) -3.87 0.88 [-5.62, -2.19]
IV = intervention assignment; mediator = ΔFFMQ score from T0 to T2; DV = Δ cognitive anxiety score from T0 to T2. The indirect effect was estimated with 5,000 bias-corrected bootstrap samples; a 95% CI that does not contain zero indicates significant mediation. Baseline values were represented through change scores rather than entered as separate covariates.