A multilevel analysis examining the association between socio- ecological factors and physical activity in Interlake youth Public Health 2014 May 28, 2014 Tannis Erickson
Jan 12, 2016
A multilevel analysis examining the association between socio-
ecological factors andphysical activity in Interlake youth
Public Health 2014May 28, 2014
Tannis Erickson
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
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
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
Ecological Model of Physical Activity
Results – Physical activity levels
54%
Results – Changes as students age
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)
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
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
Strengths/Weaknesses
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
First study of its kind in Manitoba Results will have implications for all
rural regions of the province Future development of policies,
programs and interventions can greatly benefit from these and future results
Knowledge added
Thank-you