Table 3
Adjusted odds ratios relating measured and self-reported body mass index (BMI) to selected health conditions, household population aged 40 years or older, Canada excluding territories, 2005
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| BMI category (range kg/m2) | Based on measured BMI | Based on self-reported BMI | ||
|---|---|---|---|---|
| Adjusted odds ratios | 95% confidence interval | Adjusted odds ratios | 95% confidence interval | |
| Diabetes | ||||
| Normal weight (18.5 to 24.9) | 1.0 | … | 1.0 | … |
| Overweight (25.0 to 29.9) | 1.4 | 0.7 to 2.9 | 2.6* | 1.6 to 4.3 |
| Obese class I (30.0 to 34.9) | 2.2* | 1.0 to 4.5 | 3.2* | 1.8 to 5.6 |
| Obese class II/III (35.0 or more) | 7.0* | 2.9 to 16.5 | 11.8* | 5.5 to 25.3 |
| BMI (continuous) | 1.11* | 1.07 to 1.16 | 1.13* | 1.09 to 1.18 |
| High blood pressure | ||||
| Normal weight (18.5 to 24.9) | 1.0 | … | 1.0 | … |
| Overweight (25.0 to 29.9) | 2.1* | 1.5 to 3.0 | 2.7* | 1.9 to 3.8 |
| Obese class I (30.0 to 34.9) | 3.4* | 2.3 to 5.1 | 4.3* | 2.9 to 6.3 |
| Obese class II/III (35.0 or more) | 5.5* | 3.1 to 9.8 | 7.8* | 3.7 to 16.6 |
| BMI (continuous) | 1.12* | 1.09 to 1.15 | 1.14* | 1.11 to 1.17 |
| Heart disease | ||||
| Normal weight (18.5 to 24.9) | 1.0 | … | 1.0 | … |
| Overweight (25.0 to 29.9) | 1.0 | 0.6 to 1.7 | 1.4 | 0.9 to 2.3 |
| Obese class I (30.0 to 34.9) | 1.5 | 0.8 to 2.9 | 1.6 | 1.0 to 2.6 |
| Obese class II/III (35.0 or more) | 2.6* | 1.1 to 6.0 | 5.6* | 2.3 to 13.8 |
| BMI (continuous) | 1.07* | 1.02 to 1.12 | 1.08* | 1.03 to 1.14 |
| Arthritis | ||||
| Normal weight (18.5 to 24.9) | 1.0 | … | 1.0 | … |
| Overweight (25.0 to 29.9) | 1.2 | 0.8 to 1.7 | 1.2 | 0.8 to 1.7 |
| Obese class I (30.0 to 34.9) | 1.2 | 0.8 to 1.8 | 2.0* | 1.3 to 3.0 |
| Obese class II/III (35.0 or more) | 2.9* | 1.7 to 4.8 | 3.5* | 1.7 to 7.1 |
| BMI (continuous) | 1.05* | 1.03 to 1.08 | 1.07* | 1.04 to 1.11 |
| Activity limitation | ||||
| Normal weight (18.5 to 24.9) | 1.0 | … | 1.0 | … |
| Overweight (25.0 to 29.9) | 1.2 | 0.9 to 1.6 | 1.2 | 0.9 to 1.6 |
| Obese class I (30.0 to 34.9) | 1.5* | 1.1 to 2.2 | 2.0* | 1.3 to 3.0 |
| Obese class II/III (35.0 or more) | 3.0* | 1.8 to 4.9 | 4.7* | 2.5 to 8.9 |
| BMI (continuous) | 1.06* | 1.04 to 1.08 | 1.07* | 1.04 to 1.10 |
| Fair/poor self-perceived health | ||||
| Normal weight (18.5 to 24.9) | 1.0 | … | 1.0 | … |
| Overweight (25.0 to 29.9) | 0.8 | 0.5 to 1.2 | 1.3 | 0.9 to 2.0 |
| Obese class I (30.0 to 34.9) | 1.7* | 1.0 to 2.7 | 2.8* | 1.8 to 4.3 |
| Obese class II/III (35.0 or more) | 3.2* | 1.8 to 5.6 | 5.4* | 2.5 to 11.6 |
| BMI (continuous) | 1.09* | 1.06 to 1.12 | 1.10* | 1.06 to 1.14 |
| * significantly different from estimate for normal weight category (p < 0.05) | ||||
| Notes: Models control for age (continuous) and sex. Odds ratios for underweight group are not reported because of small sample sizes. | ||||
| Source: Statistics Canada, 2005 Canadian Community Health Survey (sub-sample 2). | ||||
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