Additional Analyses
SE
REGRESSION, DETACHMENT
To explore the long-term effectiveness of the intervention, we analyzed the main effect of time at T3 for both IGs in multilevel regression analyses, which was significant for psychological detachment (B=0.24, SE 0.08; As a robustness check, we excluded the training participants from multilevel regression analyses who reported only rudimentary or no compliance to the training modules or practiced the daily tasks fewer than 2 days per week (web-based and blended training) and attended fewer than 2 group meetings (blended training), resulting in a per-protocol analysis. The results held for general effectiveness at T1 and T2 for all outcomes and again revealed no difference between the training formats. They were also similar for the long-term effectiveness of the intervention at T3, except that there was no longer a significant difference between the training formats regarding satisfaction with work-life balance at T3. As a further robustness check, we conducted all multilevel analyses with time as a numeric variable [As preliminary analyses revealed that the participants in the IGs were more likely to hold a leadership position than those in the CG, we conducted multilevel regression analyses with leadership as an additional predictor. The results held for the general effectiveness of the intervention (ie, IG vs CG × time) at T1 and T2 for all outcomes. Intervention effects between the IGs at T1 and T2 (ie, IG-BL vs IG-ON × time interaction) remained insignificant. That is, the effects of general and differential effectiveness were robust when adjusting for whether the participants held a leadership position.We conducted subgroup multilevel regression analyses to explore the effect of employment status on training effectiveness (To explore whether the participants who reported low social support at T0 profited more from the blended training, we conducted multilevel regression analyses with social support as an additional moderator. Social support was measured using the subscale for perceived available instrumental support of the Berliner Social-Support Scales [