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!