Multimorbidity, also known as multiple long-term conditions (MLTC), means living with two or more chronic illnesses.[1] For example, a person could have diabetes, heart disease and depression at the same time. Multimorbidity can have a significant impact on people's health and wellbeing. It also poses a complex challenge to healthcare systems which are traditionally focused on individual diseases.[1] Multiple long-term conditions can affect people of any age, but they are more common in older age, affecting more than half of people over 65 years old.[2][3]
^Marengoni A, Angleman S, Melis R, Mangialasche F, Karp A, Garmen A, et al. (September 2011). "Aging with multimorbidity: a systematic review of the literature". Ageing Research Reviews. 10 (4): 430–439. doi:10.1016/j.arr.2011.03.003. PMID21402176. S2CID40912813.