ArticleBMJ open2026
Frailty and subsequent decline in self-rated health among older adults in Southern Switzerland: 13-month cohort study.
Article in BMJ open, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundFrailty is a multidimensional concept of vulnerability closely associated with ageing and adverse health outcomes, including mortality, chronic diseases and functional impairments. Despite its clinical relevance, the conceptualisation of frailty remains challenging, highlighting the need to explore how it relates to general health decline over time.
objectiveTo evaluate whether a Frailty Index is associated with subsequent decline in self-rated health (SRH) over 13 months in older adults.
designLongitudinal cohort design. SETTING AND
participantsA total of 660 community dwelling participants aged 65 and older from Canton Ticino, Southern Switzerland, were included. The follow-up period, conducted as part of the Corona Immunitas study, spanned from September 2020 to November 2021.
methodsThe Rockwood Frailty Index categorised participants into frail, prefrail and robust groups based on 30 variables across seven domains. SRH trajectories were analysed over time using linear mixed-effects models, adjusting for socio-demographic and health-related covariates.
resultsFrom 660 participants, 41.5% were robust, 48.2% prefrail and 10.3% frail at baseline, with baseline mean SRH 4.22, 3.74 and 2.97, respectively. SRH declined over 13 months in all groups (β=-0.009, p<0.001), with the frail group experiencing the steepest decline (β=-0.014, p<0.001). Linear mixed-effects models confirmed significant associations between frailty status, time and SRH (p<0.01), independent of age, gender, income satisfaction and confirmed COVID-19 infection.
conclusionFrail individuals experience a more pronounced decline in SRH compared with robust and prefrail individuals, highlighting their heightened vulnerability. The Rockwood Frailty Index was associated with health deterioration over time and clearly distinguished between frailty states, supporting its use to identify older adults at higher risk of subsequent health decline and to inform early detection and prevention strategies in older populations.
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