Healthcare Professionals' Subjective Well-Being: A Systematic Review and Methodological Appraisal of Conceptual Models, Measurement Instruments, and Associated Factors.

The well-being of healthcare professionals (HCPs) is widely recognised as a critical construct related to workforce sustainability, patient safety, and healthcare system performance; however, research in this area remains conceptually fragmented. This systematic review identifies and critically analyses conceptual models, assessment instruments, and factors associated with HCPs' subjective well-being. A comprehensive literature search was conducted across six databases covering 2014 to 2024, focusing on quantitative empirical studies published in English in peer-reviewed journals. The review adhered to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Study quality was assessed using the Joanna Briggs Institute criteria, and the methodological quality of measurement instruments was evaluated with the Consensus-based Standards for the Selection of Health Measurement Instruments (COSMIN) checklist in validation-focused studies. Of the 7838 records initially identified, 48 studies met the inclusion criteria. Three primary thematic areas emerged: (1) conceptual models framing subjective well-being, (2) measurement instruments assessing subjective well-being, and (3) factors associated with subjective well-being among HCPs. Frequently applied conceptual frameworks included the job demands-resources model, Maslach burnout theory, and WHOQOL-related approaches. Commonly used instruments comprised the WHO-5, Maslach Burnout Inventory, and Mini-Z. In validation-focused studies assessed using COSMIN criteria, internal consistency and aspects of construct validity were generally reported as acceptable; however, reporting across measurement property domains was variable. Factors examined in relation to subjective well-being included workload, emotional exhaustion, social support, autonomy, and work-life balance. Overall, the reviewed literature demonstrates substantial variability in conceptual and methodological approaches and frequently focuses on single dimensions of well-being. These findings highlight the potential value of developing integrated, sector-specific frameworks to inform future measurement development and research in this field.