Fig. 6

Trial design for Phase 3. Step 1: Participants (mothers-to-be/patients and their social support providers) are initially identified and screened for eligibility. All staff members are eligible for phase 3. Step 2: If eligible, participants give informed consent. Step 3: Pre-tests⁴. Step 4: Participants are provided with the Effective Communication App. Step 5: Post-tests⁵. Step 6: 3-months follow-up; person-specific pAEs are assessed after the patient gave birth. Possible reasons for participant drop-out have already been presented in Fig. 4/5. Note: ¹ The comparator groups do not complete any tests again. Data acquisition in this group will be finished during Phase 2. ² For inclusion/exclusion criteria, see Table 6. ³ Baseline data includes baseline assessments of pAE prevalence and costs. ⁴ Pre-test assessment includes demographic data, perceived social support, competences, training-related outcomes, subjective safety culture and treatment satisfaction. ⁵ Post-test assessments include perceived social support, competences and training-related outcomes. ⁶ At three months post-intervention, perceived social support, competences, behavior change as training-related outcome, subjective safety culture and treatment satisfaction will be assessed.