title: The Sedentary Time and Activity Reporting Questionnaire (STAR-Q): reliability and validity against doubly labeled water and 7-day activity diaries.
abstract: We determined measurement properties of the Sedentary Time and Activity Reporting Questionnaire (STAR-Q), which was designed to estimate past-month activity energy expenditure (AEE). STAR-Q validity and reliability were assessed in 102 adults in Alberta, Canada (2009-2011), who completed 14-day doubly labeled water (DLW) protocols, 7-day activity diaries on day 15, and the STAR-Q on day 14 and again at 3 and 6 months. Three-month reliability was substantial for total energy expenditure (TEE) and AEE (intraclass correlation coefficients of 0.84 and 0.73, respectively), while 6-month reliability was moderate. STAR-Q-derived TEE and AEE were moderately correlated with DLW estimates (Spearman's ρs of 0.53 and 0.40, respectively; P < 0.001), and on average, the STAR-Q overestimated TEE and AEE (median differences were 367 kcal/day and 293 kcal/day, respectively). Body mass index-, age-, sex-, and season-adjusted concordance correlation coefficients (CCCs) were 0.24 (95% confidence interval (CI): 0.07, 0.36) and 0.21 (95% CI: 0.11, 0.32) for STAR-Q-derived versus DLW-derived TEE and AEE, respectively. Agreement between the diaries and STAR-Q (metabolic equivalent-hours/day) was strongest for occupational sedentary time (adjusted CCC = 0.76, 95% CI: 0.64, 0.85) and overall strenuous activity (adjusted CCC = 0.64, 95% CI: 0.49, 0.76). The STAR-Q demonstrated substantial validity for estimating occupational sedentary time and strenuous activity and fair validity for ranking individuals by AEE.
authors.forename: Ilona
authors.initials: I
authors.lastname: Csizmadi
authors.forename: Heather K
authors.initials: HK
authors.lastname: Neilson
authors.forename: Karen A
authors.initials: KA
authors.lastname: Kopciuk
authors.forename: Farah
authors.initials: F
authors.lastname: Khandwala
authors.forename: Andrew
authors.initials: A
authors.lastname: Liu
authors.forename: Christine M
authors.initials: CM
authors.lastname: Friedenreich
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yasui
authors.forename: Rémi
authors.initials: R
authors.lastname: Rabasa-Lhoret
authors.forename: Heather E
authors.initials: HE
authors.lastname: Bryant
authors.forename: David C W
authors.initials: DC
authors.lastname: Lau
authors.forename: Paula J
authors.initials: PJ
authors.lastname: Robson
mesh_terms: D000328:Adult; D000416:Alberta / Q000453:epidemiology; D001481:Basal Metabolism; D015992:Body Mass Index; D003903:Deuterium; D004032:Diet / Q000706:statistics & numerical data; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D008297:Male; D008499:Medical Records; D008875:Middle Aged; D009043:Motor Activity; D010103:Oxygen Isotopes; D015203:Reproducibility of Results; D057185:Sedentary Behavior; D011795:Surveys and Questionnaires / Q000592:standards; D014867:Water / Q000378:metabolism
chemical_list: D010103:Oxygen Isotopes; D014867:Water; D003903:Deuterium
keywords: motor activity; physical activity; questionnaires; reproducibility of results; sedentary lifestyle; validation studies