Comparison of manual and automated measures of walking speed: Distance and pace matter

Autor: Félicia Santos, Anna Ozguler, Manon Lenain, Marie Zins, Fanny Artaud, Alexis Elbaz
Přispěvatelé: Centre de recherche en épidémiologie et santé des populations (CESP), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay, Cohortes épidémiologiques en population (CONSTANCES), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Université Paris Cité (UPCité), ClinSearch [Malakoff, France], ANR-11-INBS-0002, Merck Sharp and Dohme, MSD, Université Paris-Saclay, Conservatoire National des Arts et Métiers, CNAM, FS is the recipient of a doctoral grant from Université Paris-Saclay , France., The CONSTANCES Cohort Study is supported and funded by the CNAM . The CONSTANCES Cohort Study is an Infrastructure nationale en Biologie et Santé and benefits from a grant from the ANR ( ANR-11-INBS-0002 ) and from the Ministry of Research . CONSTANCES is also partly funded by Merck Sharp & Dohme (MSD), and l'Oréal ., HAL UVSQ, Équipe
Rok vydání: 2022
Předmět:
Zdroj: Experimental Gerontology
Experimental Gerontology, 2022, 170, pp.111987. ⟨10.1016/j.exger.2022.111987⟩
ISSN: 1873-6815
0531-5565
Popis: International audience; Background: Walking speed (WS) represents a global marker of individual health and provides a simple and objective measure of motor performances for use in clinical and research settings. WS is most often measured over relatively short distances at usual (UWS) or fast (FWS) pace, using manual (e.g., stopwatch) or automated methods (e.g., photoelectric cells). As the time needed to walk over these distances is very short, we hypothesized that measurement error related to manual compared to automated WS measures is more pronounced for shorter distances and FWS and investigated the reliability and agreement of WS in a subsample of the Constances cohort at two paces and over two distances. Methods: We recruited 100 community-dwelling participants (50 % women) aged 45–70y (mean = 56.1y). WS was measured manually (stopwatches) and using photoelectric cells, at two paces (UWS/FWS) and over two distances (3 m/5 m). Agreement was examined using Bland and Altman plots and intraclass correlation coefficients (ICC). Results: Participants were on average 169.8 cm tall, and their mean body mass index was 25.4 kg/m2. Agreement between manual stopwatches and photoelectric cells was excellent (ICCs between 0.92 and 0.97), but it was lower for smaller distances, with significantly lower ICCs over 3 m compared to 5 m both for UWS (differenceICC = −0.04) and FWS (differenceICC = −0.05). Bias of manual measures was constant for UWS and increased with increasing FWS. There were inter-rater effects, with better agreement for UWS and 5 m compared to FWS and 3 m. Conclusions: Both distance and pace have an influence on the reliability of WS measures using manual timing methods. Our findings also suggest the presence of rater effects and better agreement for 5 m and UWS. These findings are helpful for the design of studies that include manual measures of WS, especially FWS, in order to reduce measurement error and suggest that longer distances are preferable.
Databáze: OpenAIRE
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