Public Health 2014 May 28, 2014 Tannis Erickson
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Transcript of Public Health 2014 May 28, 2014 Tannis Erickson
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A multilevel analysis examining the association between socio-
ecological factors andphysical activity in Interlake youth
Public Health 2014May 28, 2014
Tannis Erickson
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Determine:physical activity levels of Interlake
youth if these levels vary by gender or
over time the individual, social &
environmental factors are associated with physical activity levels
Goals
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Secondary analysis of school-based survey
Cross-sectional and longitudinal components
Youth Health Survey (YHS) in the Interlake RHA 2005 n=5436 students in 42 schools 2009 n=5275 students in 53 schools
Study
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Captured frequency, duration and level of physical activity
Converted into kilocalories per kilogram of body weight per day (KKD).
Daily KKD = (hours of moderate PA x 3 METS)
+ (hours of vigorous PA x 6 METS) divided by 7 days
Measuring physical activity
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Ecological Model of Physical Activity
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Results – Physical activity levels
54%
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Results – Changes as students age
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Results – Univariate regression
Female: 0.66 (0.60,0.70)
Grade 12: 0.61 (0.53,0.71)
3+hours sedentary time: 2.10 (1.68,2.63)
Daily smoker: 0.81 (0.73,0.90)
Overweight/obese: 0.68 (0.62,0.74)
7+ fruits/veggies: 2.57 (2.29,2.89)
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Highly associated with PA levels sex, year, active transportation to
school, healthy eating, body image and feeling close to people at school
Moderately associated with PA levels Sedentary time, feelings of
hopelessness, feeling safe at school and learning about the benefits of physical activity
Modelling results
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Surprising results: positive association between sedentary
behaviour and physical activity the fact that grade, smoking, BMI and
school level variables did not show a significant relationship with physical activity
Modelling results
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Strengths/Weaknesses
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in-depth understanding of the factors that affect physical activity is an important aspect of improving overall health
factors in all areas of the social ecological model of health behaviour need to be considered when developing health promotion programs
key variables have significant impacts on the physical activity level of youth
Public health implications
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First study of its kind in ManitobaResults will have implications for all
rural regions of the provinceFuture development of policies,
programs and interventions can greatly benefit from these and future results
Knowledge added
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Thank-you