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Table 1 Study parameters and measurement instruments

From: Nudging socially isolated people towards well-being with the ‘Happiness Route’: design of a randomized controlled trial for the evaluation of a happiness-based intervention

Outcome measure Instrument
Primary outcome measure
Emotional, social and psychological well-being Mental Health Continuum – Short Form (MHC-SF)
Secondary outcome measures
Loneliness Loneliness Scale
Depression Center for Epidemiologic Studies Depression Scale (CES-D)
Consumption of care Items from the Trimbos/iMTA questionnaire for Costs associated with Psychiatric Illness (TIC-P) and use of psychotropic drugs
Purpose in Life Purpose in Life Scale
Resilience Brief Resilience Scale
Social participation Items from different validated survey studies, such as CBS-POLS and LISS
Health-related quality of life Dutch version of the EuroQol (EQ-5D)
Moderating measures
Demographics of participants Gender, age, education, marital status, number of children, cultural background, income, employment status
Demographics of counselors Gender, age, occupational level, financial situation, cultural background
Work characteristics of counselors Work experience, work conditions
Work engagement Utrechtse Bevlogenheid Schaal (UBES)
Work satisfaction Vragenlijst Beleving en Beoordeling van de Arbeid (VBBA), General Work Satisfaction
Adherence of counselors Online logs