Table 9
Adjusted odds ratios relating self-reported, measured and corrected body mass index (BMI) to selected self-reported health conditions, household population aged 40 years or older, 2005

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BMI category (range kg/m2) Based on self-reported values Based on measured values Based on corrected values
Model 1 (Full) Model 2 (Full) Model 3 (Reduced) Model 4 (Reduced)
Adjusted odds ratio 95% confidence interval Adjusted odds ratio 95% confidence interval Adjusted odds ratio 95% confidence interval Adjusted odds ratio 95% confidence interval Adjusted odds ratio 95% confidence interval Adjusted odds ratio 95% confidence interval
Diabetes
Normal weight (18.5 to 24.9) 1.0 1.0 1.0 1.0 1.0 1.0
Overweight (25.0 to 29.9) 2.6* 1.5 to 4.3 1.4 0.7 to 2.8 1.8 0.9 to 3.3 2.0* 1.1 to 3.8 1.8* 1.1 to 3.0 2.0* 1.2 to 3.3
Obese class I (30.0 to 34.9) 3.2* 1.8 to 5.6 2.2* 1.0 to 4.5 3.3* 1.8 to 6.0 3.9* 2.1 to 7.0 3.1* 1.7 to 5.7 3.2* 1.8 to 5.8
Obese class II and III (35.0 or more) 9.0* 4.5 to 17.9 5.9* 2.5 to 14.0 6.8* 3.7 to 12.5 7.3* 3.9 to 13.9 7.6* 4.0 to 14.2 7.4* 4.0 to 13.7
High blood pressure
Normal weight (18.5 to 24.9) 1.0 1.0 1.0 1.0 1.0 1.0
Overweight (25.0 to 29.9) 2.7* 1.9 to 3.8 2.1* 1.5 to 3.0 2.3* 1.6 to 3.2 2.5* 1.8 to 3.5 2.5* 1.7 to 3.5 2.4* 1.7 to 3.3
Obese class I (30.0 to 34.9) 4.2* 2.9 to 6.3 3.4* 2.3 to 5.2 4.0* 2.8 to 5.9 4.1* 2.8 to 6.0 4.5* 3.0 to 6.6 4.7* 3.2 to 7.0
Obese class II and III (35.0 or more) 6.8* 3.2 to 14.8 5.2* 2.9 to 9.3 6.0* 3.3 to 10.7 6.0* 3.4 to 10.5 6.1* 3.4 to 10.9 5.6* 3.2 to 9.8
Heart disease
Normal weight (18.5 to 24.9) 1.0 1.0 1.0 1.0 1.0 1.0
Overweight (25.0 to 29.9) 1.4 0.9 to 2.3 1.0 0.6 to 1.7 1.3 0.8 to 2.2 1.3 0.8 to 2.2 1.2 0.7 to 2.0 1.4 0.8 to 2.2
Obese class I (30.0 to 34.9) 1.6 1.0 to 2.6 1.5 0.8 to 2.9 1.2 0.7 to 2.0 1.4 0.8 to 2.4 1.3 0.8 to 2.2 1.5 0.9 to 2.5
Obese class II and III (35.0 or more) 3.7* 1.8 to 7.7 2.1 1.0 to 4.4 3.3* 1.8 to 6.2 3.4* 1.8 to 6.5 2.9* 1.5 to 5.6 2.8* 1.5 to 5.5
Arthritis
Normal weight (18.5 to 24.9) 1.0 1.0 1.0 1.0 1.0 1.0
Overweight (25.0 to 29.9) 1.2 0.8 to 1.7 1.2 0.8 to 1.7 1.5* 1.1 to 2.0 1.5* 1.1 to 2.1 1.5* 1.1 to 2.0 1.4* 1.0 to 1.9
Obese class I (30.0 to 34.9) 2.0* 1.3 to 3.0 1.2 0.8 to 1.8 1.7* 1.2 to 2.5 1.9* 1.3 to 2.8 1.9* 1.3 to 2.8 1.7* 1.2 to 2.5
Obese class II and III (35.0 or more) 3.1* 1.5 to 6.3 2.7* 1.6 to 4.6 3.5* 2.0 to 5.8 3.2* 1.8 to 5.4 3.2* 1.9 to 5.6 3.4* 1.9 to 6.0
Activity limitation
Normal weight (18.5 to 24.9) 1.0 1.0 1.0 1.0 1.0 1.0
Overweight (25.0 to 29.9) 1.2 0.9 to 1.6 1.2 0.9 to 1.6 1.2 0.9 to 1.7 1.1 0.8 to 1.5 1.0 0.8 to 1.4 1.1 0.8 to 1.5
Obese class I (30.0 to 34.9) 2.0* 1.3 to 3.0 1.5* 1.1 to 2.2 1.4 0.9 to 2.0 1.4 1.0 to 2.1 1.5* 1.0 to 2.1 1.5* 1.0 to 2.2
Obese class II and III (35.0 or more) 4.3* 2.2 to 8.2 2.9* 1.7 to 4.7 4.2* 2.6 to 6.8 3.7* 2.3 to 6.1 3.9* 2.4 to 6.5 3.1* 1.8 to 5.2
Fair/poor self-perceived health
Normal weight (18.5 to 24.9) 1.0 1.0 1.0 1.0 1.0 1.0
Overweight (25.0 to 29.9) 1.3 0.9 to 2.0 0.8 0.5 to 1.2 1.1 0.7 to 1.6 1.1 0.8 to 1.7 1.0 0.7 to 1.5 1.0 0.7 to 1.5
Obese class I (30.0 to 34.9) 2.8* 1.8 to 4.3 1.7* 1.0 to 2.7 1.6* 1.0 to 2.5 1.7* 1.1 to 2.7 2.1* 1.3 to 3.3 2.1* 1.4 to 3.3
Obese class II and III (35.0 or more) 4.5* 2.0 to 10.2 2.9* 1.6 to 5.2 4.1* 2.4 to 7.0 4.3* 2.4 to 7.8 3.5* 1.9 to 6.5 3.6* 2.0 to 6.6
* significantly different from estimate for normal weight category (p < 0.05)
Notes: Models control for age (continuous) and sex. Odds ratios for underweight group not reported because of small sample sizes.
Source: 2005 Canadian Community Health Survey.