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
3+ days vigorous activity for 20 min
5+ days mod/walk for 30 min
5 days activity achieving 600 MET min
Highest Risk
Does not meet above
Ottawa Results CFLRI Sample
Risk Level Impact Pop’n Estimate
Lower Risk Minimum amount for health benefits
44%
Reduced Risk
Prevents obesity, chronic disease
23%
Significant Risk
At risk for chronic disease and obesity
19%
Highest Risk Premature death due to CV disease
14%
That’s not what the CCHS said…
OHS 1996
% of pop’n
CCHS 2001
% of pop’n
Active 21% 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!
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