Table 8
Sensitivity and specificity values for self-reported and corrected data, by sex, household population aged 18 years or older, 2005
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| Underweight | Normal weight | Overweight | Obese | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| % | 95% confidence interval | % | 95% confidence interval | % | 95% confidence interval | % | 95% confidence interval | % | 95% confidence interval | |
| Sensitivity (% true positives) | ||||||||||
| Men | ||||||||||
| Self-reported | F | 93.9 | 91.7 to 96.2 | 71.1 | 66.2 to 76.0 | 58.7 | 51.7 to 65.7 | 75.0 | 72.0 to 78.0 | |
| Model 1 (Full - height and weight) | F | 87.8 | 83.6 to 91.4 | 79.8 | 73.2 to 86.4 | 76.0 | 67.1 to 84.9 | 81.2 | 77.3 to 85.1 | |
| Model 2 (Full - BMI) | F | 85.5 | 80.8 to 90.1 | 81.1 | 74.5 to 87.7 | 74.6 | 65.5 to 83.8 | 80.7 | 76.7 to 84.7 | |
| Model 3 (Reduced - height and weight) | F | 83.8 | 77.6 to 90.1 | 82.8 | 76.5 to 89.0 | 70.2 | 59.9 to 80.4 | 79.9 | 75.6 to 84.1 | |
| Model 4 (Reduced - BMI) | F | 85.8 | 79.7 to 91.9 | 81.1 | 74.7 to 87.6 | 73.8 | 64.8 to 82.8 | 80.7 | 76.6 to 84.7 | |
| Women | ||||||||||
| Self-reported | 77.8 | 63.2 to 92.3 | 91.8 | 88.9 to 94.8 | 62.6 | 56.8 to 68.5 | 68.5 | 62.3 to 74.8 | 77.8 | 74.9 to 80.7 |
| Model 1 (Full - height and weight) | 66.8E | 42.6 to 91.2 | 85.1 | 79.0 to 91.3 | 74.3 | 67.7 to 81.0 | 86.1 | 78.7 to 93.5 | 81.4 | 77.4 to 85.3 |
| Model 2 (Full - BMI) | 39.3E | 18.3 to 60.4 | 83.4 | 77.2 to 89.6 | 75.0 | 68.4 to 81.5 | 85.1 | 77.5 to 92.7 | 79.7 | 75.7 to 83.8 |
| Model 3 (Reduced - height and weight) | 66.8E | 43.2 to 90.3 | 85.6 | 79.6 to 91.7 | 77.1 | 70.7 to 83.6 | 85.4 | 78.0 to 92.8 | 82.4 | 78.5 to 86.2 |
| Model 4 (Reduced - BMI) | 45.6E | 24.0 to 67.5 | 86.9 | 81.4 to 92.4 | 79.7 | 73.9 to 85.5 | 86.0 | 78.6 to 93.4 | 83.2 | 79.6 to 86.8 |
| Specificity (% true negatives) | ||||||||||
| Men | ||||||||||
| Self-reported | 99.6 | 99.4 to 99.9 | 83.2 | 80.2 to 86.1 | 79.7 | 76.3 to 83.2 | 98.3 | 96.6 to 99.7 | … | ... |
| Model 1 (Full - height and weight) | 99.8 | 99.5 to 100.0 | 92.2 | 88.7 to 95.6 | 84.1 | 79.8 to 88.3 | 94.4 | 91.5 to 97.2 | … | ... |
| Model 2 (Full - BMI) | 99.7 | 99.3 to 100.0 | 93.2 | 89.8 to 96.6 | 82.3 | 77.8 to 86.7 | 94.3 | 91.4 to 97.2 | … | ... |
| Model 3 (Reduced - height and weight) | 99.9 | 99.7 to 100.0 | 91.6 | 88.0 to 95.1 | 79.3 | 74.0 to 84.7 | 96.5 | 94.3 to 98.7 | … | ... |
| Model 4 (Reduced - BMI) | 99.8 | 99.5 to 100.0 | 91.0 | 87.3 to 94.7 | 82.2 | 77.4 to 87.0 | 96.1 | 93.7 to 98.4 | … | ... |
| Women | ||||||||||
| Self-reported | 97.7 | 96.8 to 98.5 | 78.3 | 74.6 to 82.0 | 88.9 | 86.5 to 91.2 | 99.6 | 99.3 to 99.8 | … | ... |
| Model 1 (Full - height and weight) | 99.4 | 98.8 to 99.9 | 87.1 | 82.9 to 91.3 | 87.4 | 82.9 to 91.9 | 97.0 | 95.5 to 98.4 | … | ... |
| Model 2 (Full - BMI) | 99.7 | 99.4 to 100.0 | 85.2 | 80.8 to 89.7 | 85.6 | 81.0 to 90.2 | 97.3 | 96.0 to 98.6 | … | ... |
| Model 3 (Reduced - height and weight) | 99.3 | 98.8 to 99.9 | 87.9 | 84.0 to 91.8 | 87.7 | 83.3 to 92.2 | 97.4 | 96.1 to 98.7 | … | ... |
| Model 4 (Reduced - BMI) | 99.6 | 99.1 to 100.0 | 88.0 | 84.1 to 91.9 | 88.4 | 84.3 to 92.5 | 97.5 | 96.3 to 98.8 | … | ... |
| Note: Reported estimates are based on data from split-samples A and B. Modelled estimates are generated from split-sample B. | ||||||||||
| Source: 2005 Canadian Community Health Survey. | ||||||||||
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