Clinical Frailty Scale and Biomarkers for Assessing Frailty in Elder Inpatients in China

This study aimed to assess the feasibility of the Clinical Frailty Scale (CFS) and clinical biomarkers in assessing the frailty in elder inpatients in China. The study was a cross-sectional study. The study included 642 elder inpatients (295 females and 347 males) aged ≥65 years, from the Department of Geriatrics of Zhejiang Hospital between January 2018 and December 2019. All participants underwent a comprehensive geriatric assessment and blood tests. Univariate and multivariate logistic regression was used to analyze the association between risk factors and frailty. The average age of the participants was 82.72±8.06 years (range: 65–95 years) and the prevalence of frailty was 39.1% according to the CFS. Frail participants showed significantly lower short physical performance battery (SPPB), basic activities of daily living (ADL) and instrumental activities of daily living (IADL) scores (all p<0.001), and lower hemoglobin, total protein and albumin levels (all P<0.05) than nonfrail participants. Frail participants had higher CRP, D-dimer and fibrinogen levels than nonfrail participants (all p<0.05). Univariate logistic regression analysis showed a significant association between frailty and age, comorbidity, polypharmacy, fall history, SPPB, ADL, and IADL scores, D-dimer, fibrinogen, hemoglobin, total protein and albumin levels (all P<0.05). Multivariate logistic regression analysis indicated that age (odds ratio (OR), 95% confidence interval (CI)= 1.151(1.042–1.272), P=0.006), SPPB scores (OR, 95% CI=0.901(0.601–1.350), P<0.001), and D-dimer (OR, 95% CI=4.857(2.182–6.983), P<0.001), fibrinogen (OR, 95% CI=2.665(0.977–4.254), P<0.001), hemoglobin (OR, 95% CI=0.837(0.725–0.963), P= 0.044), and albumin (OR, 95% CI=0.860 (0.776–1.188), P<0.001) levels were independently associated with frailty in all participants. Frailty in elder inpatients in China is characterized by older age, a lower SPPB scores, higher D-dimer and fibrinogen levels and lower hemoglobin and albumin levels. Functional decline and malnutrition may be the targets of frailty interventions.