A prospective, observational study of frailty, quality of life and dialysis in older people with advanced chronic kidney disease.

BACKGROUND: Frailty is prevalent in older people with chronic kidney disease (CKD) and robust evidence supporting the benefit of dialysis in this setting is lacking. We aimed to measure frailty and quality of life (QOL) longitudinally in older people with advanced CKD and assess the impact of dialysis initiation on frailty, QOL and mortality. METHODS: Outpatients aged ≥65 with an eGFR ≤ 20ml/minute/1.73m2 were enrolled in a prospective observational study and followed up four years later. Frailty status was measured using a Frailty Index (FI), and QOL was evaluated using the EuroQol 5D-5L instrument. Mortality and dialysis status were determined through inspection of electronic records. RESULTS: Ninety-eight participants were enrolled. Between enrolment and follow-up, 36% of participants commenced dialysis and 59% died. Frailty prevalence increased from 47% at baseline to 86% at follow-up (change in median FI = 0.22, p < 0.001). Initiating dialysis was not significantly associated with change in FI. QOL declined from baseline to follow-up (mean EQ-5D-5L visual analogue score of 70 vs 63, p = 0.034), though commencing dialysis was associated with less decline in QOL. Each 0.1 increment in baseline FI was associated with 59% increased mortality hazard (HR = 1.59, 95%CI = 1.20 to 2.12, p = 0.001), and commencing dialysis was associated with 59% reduction in mortality hazard (HR = 0.41, 95%CI = 0.20 to 0.87, p = 0.020) irrespective of baseline FI. CONCLUSIONS: Frailty increased substantially over four years, and higher baseline frailty was associated with greater mortality. Commencing dialysis did not affect the trajectory of FI but positively influenced the trajectory of QOL from baseline to follow-up. Within the limitations of small sample size, our data suggests that frail participants received similar survival benefit from dialysis as non-frail participants.

Interventions for frail older inpatients: A systematic review of frailty measures and reported outcomes in randomised controlled trials.

OBJECTIVE: To summarise frailty measures and outcomes reported in trials involving frail older inpatients. METHODS: Databases were searched for randomised controlled trials enrolling frail older inpatients. RESULTS: Twenty-four articles describing twelve trials were included. Seven trials applied six tools to measure frailty, whilst five trials employed ad hoc measures. Eighty outcomes were examined with survival and functional status reported most commonly. Nine studies trialled multidisciplinary, geriatrician-led interventions. Statistically significant between-group differences were detected for at least one outcome in ten trials. All studies represented high risk of bias within at least one domain. CONCLUSIONS: Heterogeneity of interventions, measurement of frailty and outcomes reported limit generalisability of findings. Many articles purport to study frail patients, yet do not enrol patients using any frailty measurement tool. Utilising validated instruments to measure frailty and a standard set of health outcomes relevant to older people would assist consistent reporting and evaluation of future studies.