ArticleSao Paulo medical journal = Revista paulista de medicina2026
FINE, a novel laboratory-based frailty index for elderly patients: a retrospective descriptive study.
Article in Sao Paulo medical journal = Revista paulista de medicina, 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 in older adults is a multifactorial geriatric syndrome associated with inflammation, malnutrition, and hematological decline. Objective and easily applicable laboratory-based indices may complement clinical frailty assessment by providing rapid and low-cost screening tools, particularly in primary care and resource-limited settings.
objectivesTo develop a simple laboratory-based frailty screening index (FINE, Frailty Index for the Elderly) using C-reactive protein (CRP), albumin, hemoglobin, and sex, and to evaluate its association with the Clinical Frailty Scale (CFS) in older adults. DESIGN AND
settingA retrospective descriptive study conducted using electronic health records of individuals aged 80 years and older.
methodsData from 322 older adults were analyzed. Their FINE scores were calculated by assigning 0 or 1 point to CRP, albumin, hemoglobin, and sex based on clinically accepted reference thresholds, yielding a total score ranging from 0 to 4. Frailty was assessed using pre-recorded CFS scores. Associations between FINE scores, CFS, and individual biomarkers were examined. The screening performance was evaluated using receiver operating characteristic (ROC) curve analysis.
resultsThe mean age of participants was 84.9 ± 4.0 years, and 55.6% were female. The prevalence rate of frailty was 46.6%. FINE scores exhibited a positive correlation with CFS and CRP levels, and a negative correlation with albumin and hemoglobin levels (p < 0.005). ROC analysis demonstrated a statistically significant but moderate discriminatory ability for frailty (area under the curve = 0.642; 95% confidence interval: 0.5820.703). At a cut-off value of ≥ 0.5, FINE scores demonstrated high sensitivity (89.3%) but low specificity (22.1%).
conclusionThe FINE score is a simple, rapid, and low-cost laboratory-based frailty screening tool that is significantly associated with clinical frailty and key biological processes underlying frailty. Although low specificity limits its use as a diagnostic instrument, it may serve as a practical first-step screening approach in primary care and resource-limited settings. Further multicenter prospective studies are required to validate these findings.
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