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Older patients often suffer from multiple comorbid conditions. Few comorbidity indices are valid and reliable in the elderly and were rarely compared.To compare the performance, relevance, and ability of 6 widely used and validated comorbidity indices—Charlson Comorbidity Index, Cumulative Illness Rating Scale–Geriatrics, Index of Coexistent Diseases, Kaplan, Geriatric Index of Comorbidity (GIC),...
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