Determinants of Frailty Dynamics in Europe: The Role of Psychosocial Factors

Abstract

Population ageing poses major challenges for European health systems. Frailty is an age-related syndrome of reduced physiological reserve that evolves dynamically and may be reversible. Using longitudinal data from Waves 6–8 (2015–2019/20) of the Survey of Health, Ageing and Retirement in Europe (SHARE), we analyzed frailty transitions among 28,187 community-dwelling adults aged 50 + across 17 countries. Frailty status was operationalized using the SHARE-adapted Frailty Phenotype, defining three states—non-frail, pre-frail and frail. To model transitions between these states, we estimated a continuous-time multi-state Markov model with death as an absorbing state. Baseline covariates included age, gender, macro-region, chronic conditions, perceived loneliness and financial difficulties (Wave 6). Over the four-and-a-half-year follow-up, 61% of non-frail individuals remained stable, 34% transitioned to pre-frailty, 2% progressed directly to frailty and 3% died. Among pre-frail individuals, 28% recovered to non-frail status, 57% remained stable, 7% became frail and 8% died. Of those frail at baseline, 35% improved to pre-frail, 28% remained frail and 36% died. Age ≥ 75 years consistently reduced the likelihood of improvement and increased the risks of worsening and death. Chronic conditions and financial difficulties predicted both deterioration and mortality, whereas perceived loneliness was associated with lower recovery rates and faster progression particularly from pre-frailty to frailty. Women exhibited lower mortality risk, while older adults in Northern-Continental Europe showed modestly better recovery and survival profiles than those in Mediterranean and Eastern regions. These findings reinforce the view of frailty as a dynamic, reversible continuum shaped by the accumulation of health and psychosocial determinants. Preventive strategies should prioritize pre-frail individuals, with targeted interventions addressing loneliness, chronic disease management and financial hardship.