Abstract
Self-reported assessment of physical activity (PA) is commonly used in public health research. The present study investigated the concordance of self-reported PA assessed using the global physical activity questionnaire (GPAQ) and two different measurement approaches. Participants (n = 307, aged 30–75 years with hypertension) were recruited from a rural area in Bangladesh. We analyzed the difference between the World Health Organization (WHO) recommendations of more than 600 metabolic-equivalent time-minutes (MET-min) and the self-reported active hours, at least 2.5 h per week. Tests of sensitivity and specificity were conducted to determine concordance between the two measures. According to the WHO criteria, 255 (83%) participants were active more than 600 MET-min per week and 172 (56%) people were physically active 2.5 h or more per week, indicating a 27% difference in self-reported PA. The sensitivity, specificity, positive and negative predictive values and concordance between the two measures were 64%, 92%, 98%, 34% and 70%, respectively. Considering the WHO MET-min as the appropriate measure, 89 (35%) were false negative (FN). Older age, professionals and businesspersons were associated with a higher proportion of FN. There is a gap between self-reported PA, thus a better estimate of PA may result from combining two criteria to measure PA levels.
Highlights
Physical inactivity and sedentary behavior are important modifiable risk factors associated with hypertension and all-cause mortality [1,2,3,4,5]
The study involved baseline data collected as part of a cluster randomized controlled trial (RCT) conducted with 307 participants aged 30–75 years in the Banshgram Union of the Narail District in Bangladesh
Participants from the cross-sectional Bangladesh Populationbased Diabetes and Eye Study [35,36], who were previously diagnosed with stage 1 hypertension [37], were the source for the current investigation
Summary
Physical inactivity and sedentary behavior are important modifiable risk factors associated with hypertension and all-cause mortality [1,2,3,4,5]. It is estimated that physical inactivity caused 6% (ranging from 3.2% in southeast Asia to 7·8% in the eastern Mediterranean region) of the burden of disease from coronary heart disease, 7%. (range 0.41–0.95) years by elimination of physical inactivity [6,7]. Estimates of physical activity often rely on self-reported responses [8,9,10,11,12], which are prone to subjective biases and are less accurate than objective measures [13]. An accurate measurement of physical activity is important in order to understand physical activity-related diseases [14] and to determine the dose–response relationship between the volume, duration, intensity and
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