Table 3
Sensitivity and specificity values for parent-reported body mass index categories, by sex and age group, household population aged 6 to 11, Canada, 2007 to 2009
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International Obesity Task Force BMI cut-points | World Health Organization BMI cut-points | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Sensitivity | Specificity | Sensitivity | Specificity | |||||||||
% | 95% confidence interval | % | 95% confidence interval | % | 95% confidence interval | % | 95% confidence interval | |||||
from | to | from | to | from | to | from | to | |||||
Total | ||||||||||||
Normal weight† | 83.0 | 77.7 | 87.3 | 75.6 | 67.0 | 82.5 | 78.4 | 72.5 | 83.4 | 73.2 | 66.7 | 78.8 |
Overweight | 56.5 | 42.0 | 70.0 | 89.2 | 84.7 | 92.5 | 38.3 | 26.9 | 51.2 | 84.8 | 80.5 | 88.2 |
Obese | 50.6 | 40.4 | 60.7 | 90.6 | 85.2 | 94.1 | 66.2 | 55.0 | 75.8 | 88.0 | 82.0 | 92.2 |
Sex | ||||||||||||
Boys
|
||||||||||||
Normal weight†
|
79.1 | 70.1 | 85.9 | 82.7 | 70.1 | 90.7 | 74.1 | 63.5 | 82.5 | 81.3 | 70.1 | 89.0 |
Overweight
|
60.8 | 45.2 | 74.4 | 85.9 | 79.4 | 90.5 | 40.4 | 26.5 | 56.1 | 83.2 | 77.2 | 87.8 |
Obese
|
62.6 | 38.5 | 81.7 | 89.8 | 81.4 | 94.7 | 76.3 | 56.7 | 88.8 | 85.5 | 76.7 | 91.3 |
Girls
|
||||||||||||
Normal weight†
|
87.1 | 84.2 | 89.6 | 67.0 | 50.1 | 80.4 | 82.6 | 79.1 | 85.6 | 62.5 | 51.0 | 72.8 |
Overweight
|
51.6 | 34.5 | 68.3 | 92.6 | 88.7 | 95.3 | 36.2 | 21.9 | 53.4 | 86.5 | 83.1 | 89.3 |
Obese
|
34.1 | 16.8 | 56.9 | 91.4 | 87.8 | 94.0 | 46.0 | 21.9 | 72.1 | 90.5 | 86.6 | 93.4 |
Age group (years) | ||||||||||||
6 to 8
|
||||||||||||
Normal weight†
|
79.4 | 72.8 | 84.7 | 78.2 | 63.3 | 88.2 | 75.7 | 65.9 | 83.4 | 77.6 | 70.9 | 83.1 |
Overweight
|
47.3 | 23.8 | 72.0 | 90.0 | 85.1 | 93.4 | 36.0 | 23.5 | 50.7 | 87.4 | 82.1 | 91.3 |
Obese
|
45.4 | 23.9 | 68.9 | 84.9 | 76.3 | 90.8 | 68.8 | 50.4 | 82.7 | 83.5 | 75.7 | 89.2 |
9 to 11
|
||||||||||||
Normal weight†
|
85.9 | 80.5 | 90.1 | 73.9 | 64.6 | 81.5 | 80.7 | 74.4 | 85.8 | 70.6 | 61.6 | 78.3 |
Overweight
|
62.3 | 48.1 | 74.7 | 88.5 | 82.7 | 92.6 | 39.4 | 23.8 | 57.6 | 82.6 | 76.3 | 87.5 |
Obese
|
53.2 | 39.4 | 66.6 | 94.9 | 91.5 | 97.0 | 64.0 | 49.0 | 76.7 | 91.3 | 86.0 | 94.8 |
† includes underweight Source: 2007 to 2009 Canadian Health Measures Survey. |
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