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A new measure to quantify sedentary behavior using accelerometer data: Application to the Hispanic Community Health Study/Study of Latinos.

TitleA new measure to quantify sedentary behavior using accelerometer data: Application to the Hispanic Community Health Study/Study of Latinos.
Publication TypePublication
Year2022
AuthorsXue X, Cai J, Qi Q, Carlson J, Mossavar-Rahmani Y, Kaplan R, Wang T
JournalStat Methods Med Res
Volume31
Issue4
Pagination612-625
Date Published2022 04
ISSN1477-0334
KeywordsAccelerometry, Hispanic or Latino, Humans, Public Health, Sedentary Behavior
Abstract

Availability of accelerometer data has made it possible to objectively and continuously monitor sedentary behavior. Various summaries of the extensive accelerometer data have been used to understand the relationship between sedentary behavior and health. However, the widely used summary measures on sedentary bouts, average bout length or its derivatives, fail to reveal patterns of accumulated sedentary behavior over time. Studies have suggested that prolonged uninterrupted sedentary behavior can be an important metric that is related to health states. Yet existing measures to capture the prolonged sedentary patterns either rely on parametric assumptions on the underlying distribution of sedentary bout length or have to categorize sedentary bout length into somewhat arbitrary categories. Gini index was also used; however, it only measures the variability in bout lengths but not the actual length. To overcome these limitations, we proposed a non-parametric weighted survival function to characterize uninterrupted sedentary behavior over time in a continuous fashion and used the area under the survival curve as a new summary measure to quantify sedentary behavior. We showed that this measure is a weighted average of bout length and contains the information on both the mean and variability of bout lengths. We demonstrated in the simulation studies that the proposed measure could better identify prolonged uninterrupted sedentary behavior and predict health outcomes. We applied this new measure and existing sedentary measures to data from the Hispanic Community Health Study/Study of Latinos to examine the association between sedentary behavior and overweight/obesity.

DOI10.1177/09622802211029033
Alternate JournalStat Methods Med Res
PubMed ID34846981
Grant ListR01 HL136266 / HL / NHLBI NIH HHS / United States
N01HC65233 / HL / NHLBI NIH HHS / United States
N01HC65234 / HL / NHLBI NIH HHS / United States
N01HC65235 / HL / NHLBI NIH HHS / United States
N01HC65236 / HL / NHLBI NIH HHS / United States
N01HC65237 / HL / NHLBI NIH HHS / United States
MS#: 
0945
Manuscript Lead/Corresponding Author Affiliation: 
Field Center: Bronx (Einstein College of Medicine)
ECI: 
Manuscript Affiliation: 
Field Center: Bronx (Einstein College of Medicine)
Manuscript Status: 
Published