Table 1. Key definitions underpinning the WISE study and research questions.

Term	Definition	Research question(s)
Well-being (W)	Multidimensional construct that encompasses personal satisfaction with physical, mental, social, spiritual, and environmental dimensions of being 33. It represents a lifelong, dynamic process.	What are the perceptions of older people regarding the influence of COVID-19 on their daily lives and how does this relate to their mental health and well-being?
Interventions (I)	Comprehensive array of actions carried out by a broad range of formal providers ‘for, with or on behalf of a person or population whose purpose is to assess, improve, maintain, promote or modify health, functioning or health conditions’ 34. Non-health interventions, programs and policies that impact well-being through the social determinants of health are also considered.	What interventions have older people found useful during the COVID-19 pandemic? What do older people perceive as significant barriers or enablers for accessing interventions during COVID-19?
Support (S)	Encompasses all measures and empowering approaches taken to preserve and improve psychosocial well-being by the individuals themselves, other stakeholders including family or friends and environmental factors.	How do socio-ecological factors support or hinder older people’s well-being and mental health during the COVID-19 pandemic? How do supporting and hindering factors at diverse levels of the socio-ecological model interact with each other through the course of the pandemic?
Epidemics (E)	Refers to an increase, often sudden, in the number of cases of a disease above what is normally expected in a given population 35.	-