Gender, Age, and Education Level Modify the Association between Body Mass Index and Physical Activity: A Cross-Sectional Study in Hangzhou, China

Numerous studies have reported a strong inverse association between BMI and physical activity in western populations. Recently, the association between BMI and physical activity has been considered bidirectional. This study aimed to examine the associations of body mass index (BMI) with physical act...

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Bibliographic Details
Published in:PloS one 2015-05, Vol.10 (5), p.e0125534-e0125534
Main Authors: Fan, Mengyu, Su, Meng, Tan, Yayun, Liu, Qingmin, Ren, Yanjun, Li, Liming, Lv, Jun
Format: Article
Language:English
Subjects:
Adult
Age
Age (Biology)
Analysis
Body mass
Body Mass Index
Body size
China
China - epidemiology
Cross-Sectional Studies
Demographics
Education
Exercise
Female
Gender
Households
Human behavior
Humans
Influence
Male
Middle Aged
Mortality
Motor Activity
Multilevel
Obesity
Physical activity
Physiological aspects
Public Health Surveillance
Random sampling
Regression models
Risk Factors
Sedentary behavior
Self Report
Sex
Statistical analysis
Studies
Surveys
Young Adult
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Summary:Numerous studies have reported a strong inverse association between BMI and physical activity in western populations. Recently, the association between BMI and physical activity has been considered bidirectional. This study aimed to examine the associations of body mass index (BMI) with physical activity and sedentary behavior and to explore whether those associations were modified by socio-demographic characteristics. We conducted a multistage random sampling survey in three districts of Hangzhou, China, in 2012. The International Physical Activity Questionnaire long form was used to collect data regarding physical activity and sedentary behavior. A multilevel mixed-effects regression model was used to assess the associations of BMI with physical activity and sedentary behavior. A total of 1362 eligible people (624 men and 738 women, ages 23-59 years) completed the survey. People who are young or middle-aged and have the highest education level are the most inactive. Significant differences in the associations between physical activity and BMI across socio-demographic groups were identified (sex*BMI, P=0.018; age*BMI, P
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0125534