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Detail of Approved Project (Reference No.: 10111501)
Fund
:
HMRF - Health and Health Services (including HHSRF)
Project Status
:
Closed
Reference No.
:
10111501
Project Title
:
Understanding the relative contribution and interactive effects of psychological, social and environmental correlates of physical activity, sedentary behaviours and dietary behaviours in Hong Kong adolescents
Research Activity Code
:
Aetiology
Health Category
:
Cardiovascular
Applicant(s)
:
Cerin E
(1)
Sit CHP
(2)
Wong SHS
(2)
Hunag YJ
(2)
Gao GY
(3)
Mak KH
(4)
Lai PC
(5)
Macfarlane DJ
(1)
Chow MCB
(1)
Barnett A
(1)
Affiliation(s)
:
Institute of Human Performance, The University of Hong Kong
(1)
Department of Sports Science and Physical Education, The Chinese University of Hong Kong
(2)
School of Public Health and Primary Care, The Chinese University of Hong Kong
(3)
Department of Health
(4)
Department of Geography, The University of Hong Kong
(5)
Approved Amount (HK$)
:
$772,995.00
Abstract
:
BACKGROUND: To improve the low observed prevalence of healthful physical activity and dietary behaviours in Hong Kong adolescents, it is important to identify individual, social and environmental facilitators and barriers to engagement in such behaviours. OBJECTIVES:This project aims to (a) examine the independent and interactive effects of individual, social and environmental factors on physical activity, sedentary and dietary behaviours; (b) examine the relative contributions of environmental, psychosocial and behavioural variables to explain variance in body mass index (BMI); (c) estimate the contribution of active transport to total physical activity; and (d) identify neighbourhood characteristics associated with active modes of transport in Hong Kong adolescents. Hence, this proposal addresses the HHSRF thematic priority "Identification of factors that influence health behavior". DESIGN/METHODS: A sample of 1280 Hong Kong adolescents (11-18 yrs) and their primary caregivers will be recruited from 32 neighbourhoods stratified by socio-economic status and walkability. Survey data on physical activity, sedentary, dietary and travel behaviours and their individual, social and environmental correlates will be collected from adolescents and/or primary caregivers on two occasions (6 months apart). Forty percent of adolescents will also wear a motion sensor and a GPS monitor for 7 consecutive days on two occasions. Objective data on neighbourhood characteristics will be collected using environmental audits and Geographic Information Systems. HYPOTHESES: Individual (e.g., self-efficacy, decisional balance), social (e.g., social support from peers) and environmental factors (e.g., school and home environment variables) will independently contribute to the explanation of self-reported and objectively-measured physical activity and sedentary behaviours in adolescents. Individual, social and environmental factors will independently contribute to the explanation of fat intake, fruit and vegetable consumption and consumption of sugar-sweetened beverages in adolescents. Physical activity, sedentary and dietary behaviours will be independently but differentially associated with objectively-measured BMI in adolescents. The combination (interactions) of environmental, individual and social correlates of a specific behaviour will explain more variance of the behaviour than each of them individually. Students engaging in active transportation will have higher levels of physical activity than their counterparts. Neighbourhood walkability and access to recreational and commercial services will be positively related with level of transportation-related physical activity
Keywords
:
Adolescents, Physical activity, Sedentary behavior, Dietary behavior, Ecological model, Built environment, Accelerometers, Geographic Information Systems
Instruments
:
Remarks
:
Dissemination Report
:
10111501_DR.pdf
Final Report
:
10111501fr.pdf
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