학술논문
What Cut-Point in Gait Speed Best Discriminates Community-Dwelling Older Adults With Mobility Complaints From Those Without? A Pooled Analysis From the Sarcopenia Definitions and Outcomes Consortium
Document Type
article
Author
Cawthon, Peggy M; Patel, Sheena M; Kritchevsky, Stephen B; Newman, Anne B; Santanasto, Adam; Kiel, Douglas P; Travison, Thomas G; Lane, Nancy; Cummings, Steven R; Orwoll, Eric S; Duchowny, Kate A; Kwok, Timothy; Hirani, Vasant; Schousboe, John; Karlsson, Magnus K; Mellström, Dan; Ohlsson, Claes; Ljunggren, Östen; Xue, Qian-Li; Shardell, Michelle; Jordan, Joanne M; Pencina, Karol M; Fielding, Roger A; Magaziner, Jay; Correa-de-Araujo, Rosaly; Bhasin, Shalender; Manini, Todd M
Source
The Journals of Gerontology Series A. 76(10)
Subject
Language
Abstract
BackgroundCut-points to define slow walking speed have largely been derived from expert opinion.MethodsStudy participants (13 589 men and 5043 women aged ≥65years) had walking speed (m/s) measured over 4-6 m (mean ± SD: 1.20 ± 0.27 m/s in men and 0.94 ± 0.24 m/s in women.) Mobility limitation was defined as any self-reported difficulty with walking approximately 1/4 mile (prevalence: 12.6% men, 26.4% women). Sex-stratified classification and regression tree (CART) models with 10-fold cross-validation identified walking speed cut-points that optimally discriminated those who reported mobility limitation from those who did not.ResultsAmong 5043 women, CART analysis identified 2 cut-points, classifying 4144 (82.2%) with walking speed ≥0.75 m/s, which we labeled as "fast"; 478 (9.5%) as "intermediate" (walking speed ≥0.62 m/s but