Measurement of Active and Sedentary Behavior in Context of Large Epidemiologic Studies.
Med Sci Sports Exerc
; 50(2): 266-276, 2018 02.
Article
em En
| MEDLINE
| ID: mdl-28930863
ABSTRACT
INTRODUCTION/PURPOSE:
To assess the utility of measurement methods that may be more accurate and precise than traditional questionnaire-based estimates of habitual physical activity and sedentary behavior we compared the measurement properties of a past year questionnaire (AARP) and more comprehensivemeasures:
an internet-based 24-h recall (ACT24), and a variety of estimates from an accelerometer (ActiGraph).METHODS:
Participants were 932 adults (50-74 yr) in a 12-month study that included reference measures of energy expenditure from doubly labeled water (DLW) and active and sedentary time via activPAL.RESULTS:
Accuracy at the group level (mean differences) was generally better for both ACT24 and ActiGraph than the AARP questionnaire. The AARP accuracy for energy expenditure ranged from -4% to -13% lower than DLW, but its accuracy was poorer for physical activity duration (-48%) and sedentary time (-18%) versus activPAL. In contrast, ACT24 accuracy was within 3% to 10% of DLW expenditure measures and within 1% to 3% of active and sedentary time from activPAL. For ActiGraph, accuracy for energy expenditure was best for the Crouter 2-regression method (-2% to -7%), and for active and sedentary time the 100 counts per minute cutpoint was most accurate (-1% to 2%) at the group level. One administration of the AARP questionnaire was significantly correlated with long-term average from the reference measures (ρTX = 0.16-0.34) overall, but four ACT24 recalls had higher correlations (ρTX = 0.48-0.60), as did 4 d of ActiGraph assessment (ρTX = 0.54-0.87).CONCLUSIONS:
New exposure assessments suitable for use in large epidemiologic studies (ACT24, ActiGraph) were more accurate and had higher correlations than a traditional questionnaire. Use of better more comprehensive measures in future epidemiologic studies could yield new etiologic discoveries and possibly new opportunities for prevention.
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Base de dados:
MEDLINE
Assunto principal:
Exercício Físico
/
Metabolismo Energético
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Actigrafia
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Comportamento Sedentário
Tipo de estudo:
Observational_studies
Limite:
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Med Sci Sports Exerc
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Moldávia