Association between combined environmental factors and multimorbidity in older adults.

As the world's population ages, the prevalence of multimorbidity, defined as the presence of two or more chronic conditions, is increasing, affecting one in three people worldwide. Multimorbidity is a major public health challenge, leading to increased healthcare costs, reduced quality of life and socio-economic inequalities. Environmental factors such as air pollution, poverty and urbanisation play a significant role in multimorbidity risk. This study aims to develop a predictive model that identifies key environmental determinants of multimorbidity in older adults. By creating a composite environmental index, this research will inform preventive strategies and interventions for healthy ageing in diverse neighbourhoods.