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.