Agreement between Clinical Frailty Scale-scores based on information from patient interviews and Clinical Frailty Scale-scores based on information from medical records - a cross sectional study

Abstract Introduction Frailty is an age-related condition with increased risk for adverse health outcomes. Assessing frailty according to the Clinical Frailty Scale (CFS) based on data from medical records is useful for previously unassessed patients, but the validity of such scores in exclusively geriatric populations and in patients with dementia is relatively unknown. Methods Patients admitted for the first time to one of two geriatric wards at Örebro University hospital between January 1st – December 31st, 2021, were included in this study if they had been appointed a CFS-score by anamnestic interview (CFS I ) at admission. CFS scores based on medical records (CFS R ) were appointed by a single medical student, who was blinded to the CFS I score. Score-agreement was evaluated with quadratic weighted Cohen’s kappa ( κ ). Results In total, 145 patients between the age of 55–101 were included in the study. The CFS R and CFS I scores agreed perfectly in 102 cases (0.7, 95% CI 0.65–0.77). There was no significant difference regarding age, sex, comorbidity, or number of patients diagnosed with dementia between the patients with complete agreement and the patients whose scores did not agree. Agreement between the scores was substantial, κ = 0.66, 95% CI 0.53–0.80. Conclusions CFS scores based on information from medical records can be generated with substantial agreement to CFS scores based on in-person anamnestic interviews. A dementia diagnosis does not influence the agreement between the scores. Therefore, these scores are a useful tool for assessing frailty in geriatric patients who previously lack a frailty assessment, both in clinical practice and future research. The results support previous findings, but larger studies are warranted.