TABLE 1.
Prevalence of malnutrition at the national level in children with cystic fibrosis1
| Proportion of patients (n = 14 702) | Comments | |
|---|---|---|
| % | ||
| 2002 CFF definition of nutritional failure | ||
| HTp < 5th or BMIp < 10th or %IBW < 902 | 33.0 | Malnutrition rate overestimated because of misclassification by %IBW |
| Possible categories of nutritional failure | ||
| Category 1: HTp > 5th, BMIp >10th, %IBW < 90 | 6.2 | Normal (misclassification of underweight by %IBW) |
| Category 2: HTp > 5th, BMIp < 10th, %IBW > 90 | 2.7 | Underweight (misclassification of normal weight by %IBW) |
| Category 3: HTp < 5th, BMIp < 10th, %IBW > 90 | 2.5 | Underweight and short stature (misclassification of normal weight by %IBW) |
| Category 4: HTp < 5th, BMIp > 10th, %IBW < 90 | 0.0 | Short stature (misclassification of underweight by %IBW) |
| Category 5: HTp > 5th, BMIp < 10th, %IBW < 90 | 7.6 | Underweight |
| Category 6: HTp < 5th, BMIp > 10th, %IBW > 90 | 13.2 | Short stature |
| Category 7: HTp < 5th, BMIp < 10th, %IBW < 90 | 0.9 | Underweight and short stature |
| Corrected classification of nutritional failure3 | ||
| Overall | 26.8 | Corrected nutritional failure after elimination of %IBW < 90 |
| HTp > 5th, BMIp < 10th | 10.3 | Underweight |
| HTp < 5th, BMIp > 10th | 13.2 | Short stature |
| HTp < 5th, BMIp < 10th | 3.4 | Underweight and short stature |
| New (2005) definition of below BMI goal | ||
| BMIp < 50th | 56.8 | “Short stature” not identified |
1
HTp, height percentile; BMIp, BMI percentile; %IBW, percentage of ideal body weight; CFF, Cystic Fibrosis Foundation.
2
Weight-for-height percentile was used instead of BMIp for children <2 y old.
3
Corrected classification refers to the elimination of %IBW as an indicator of underweight.