Objective: The aim of this systematic review was to investigate the methods used for estimating the population attributable fraction (PAF) to leisure-time physical inactivity (PI) of coronary artery diseases, hypertension and stroke in order to provide the best available estimate for PAF.
Design: Systematic review.
Data Sources: Four electronic databases (MEDLINE/PubMed, EMBASE, SPORTDiscus, and Cumulative Index to Nursing and Allied Health Literature) were searched from inception to August 2018.
Eligibility Criteria For Selecting Studies: This review included prospective cohort studies, with men and women aged ≥18 years old, investigating the PAF attributable to leisure-time PI related to coronary artery diseases, hypertension and stroke.
Results: The PAF estimates of the three studies included were 13% (3%-22%) for 'stage-1 hypertension' subtype incidence due to 'non-regular exercise'; 25% (10.4%-35.8%) for 'stage-2 hypertension' subtype incidence due to 'activity of daily living' and 'vigorous-intensity sports'; and 8.5% (1.7%-16.7%) for 'total: fatal and non-fatal' cardiovascular events of 'incidence and mortality' endpoints due to non-accumulation of 550 kcal/week (subsets not specified).
Conclusions: The PAF estimate exhibited a protective dose-response relationship between hypertension and an increased amount of energy expenditure of leisure-time PI. In order to enhance accuracy of PAF estimates, the following steps are recommended: (1) to clearly define and state the working definition of leisure-time PI and dose using a reliable and valid objective measurement tool; (2) use a clear definition of outcome subtypes and endpoints using reliable and valid objective measures; and (3) estimate PAF using modelling techniques based on prospective data and ensuring to report 95% CI.
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| http://dx.doi.org/10.1136/bmjsem-2019-000512 | DOI Listing |
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