Physical Activity Module: Data Analysis Issues

Jennifer Pennock Ottawa Public Health

Physical Activity Working Group

 Durham  Middlesex London  Ottawa  Toronto

Background

 Need for a physical activity module  Physical activity module working group  Considered pre-existing survey instruments: – CCHS – – BRFSS IPAQ  Consultation with CFLRI

International Physical Activity Questionnaire

 Undergone validity and reliability testing  Valid in ages 15 to 65  Long and Short versions  Being used by CFLRI to complete Physical Activity Monitor  Short Last 7 day recall used in RRFSS  First appeared in RRFSS January, 2003

IPAQ Scoring Protocol

 Algorithm of: – Number of days per week – – Time spent (minutes) doing activity Activity level (vigorous, moderate, walking)  MET minutes per week  Derives four levels of ‘risk’

How Much?

 Canada’s Physical Activity Guide: 1 hr per day  CDC: 1 hr per day  US Surgeon General: 150 min in 5 sessions over a week  WHO: 1 hr per day

The Four Risk Levels

Lower Risk 7 days of activity per week AND 1500 MET min per week AND includes 3+ days 20 minutes vigorous activity Reduced Risk 7 days of activity AND 1500 MET min OR 3+ days vigorous activity AND 1500 MET min per week Significant Risk Highest Risk 3+ days vigorous activity for 20 min 5+ days mod/walk for 30 min 5 days activity achieving 600 MET min Does not meet above

Ottawa Results CFLRI Sample Risk Level Impact

Lower Risk Reduced Risk Significant Risk Minimum amount for health benefits Prevents obesity, chronic disease At risk for chronic disease and obesity Highest Risk Premature death due to CV disease

Pop’n Estimate

44% 23% 19% 14%

That’s not what the CCHS said…

Active OHS 1996 % of pop’n 21% CCHS 2001 % of pop’n 21% Moderate 27% 28% Inactive 52% 51%

IPAQ vs. CCHS

 CCHS looks only at leisure time activity  IPAQ crosses all domains: leisure time, domestic, occupational and transport related activity  Do not compare IPAQ results with CCHS

The Good News….

 Comprehensive measure of physical activity  Provincial and National comparisons!

 Syntax is written!