Korean version of the Fatigue, Resistance, Ambulation, Illnesses and Loss of weight questionnaire versus the Modified Kihon Checklist for Frailty Screening in Community-Dwelling Older Adults: The Aging Study of PyeongChang Rural Area.

Aim: To compare the five-item Korean version of the Fatigue, Resistance, Ambulation, Illnesses and Loss of weight (K-FRAIL) questionnaire versus the 28-item Kihon + 3 index (the 25-item original Kihon checklist plus multimorbidity, sensory impairment, and Timed Up and Go test) in identifying prefrail or frail older adults.

Methods: We carried out a cross-sectional analysis of 212 community-dwelling older adults (mean age 76 years; 41% male) in PyeongChang County, Korea. We compared the C statistic, sensitivity and specificity of the K-FRAIL questionnaire (range 0-5; cut-point ≥1) versus the Kihon + 3 index (range 0-31; cut-point ≥4) and the original Kihon checklist (range 0-25; cut-point ≥4) in identifying prefrail or frail individuals according to the Cardiovascular Health Study criteria.