Table 4.
Cross-classification of high BIVsa at the initial and subsequent examination
| High, Initial BIV | High BIV at age 4 y | Classification Performance | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| No | Yes | Row Sum | Odds Ratio (95% CI)b | + Predictive value | Sensitivity | Specificity | + Likelihood Ratio | ||
| Modified weight | |||||||||
| z-score of 5 – 24.9 | |||||||||
| No | 3,566,615c | 15,170 | 3,581,785 | 329 (313, 339) | 58.3 | 43.2 | 99.8 | 216.0 | |
| Yes | 8,243 | 11,532 | 19,775 | ||||||
| Modified height | |||||||||
| z-score of 3 – 24.9 | |||||||||
| No | 3,530,569 | 30,811 | 3,561,380 | 29.1 (28, 30) | 20.2 | 20.9 | 99.1 | 23.2 | |
| Yes | 32,052 | 8,128 | 40,180 | ||||||
| Modified BMI | |||||||||
| z-score of 5 – 24.9 | |||||||||
| No | 3,550,256 | 25,370 | 3,575,626 | 254 (247, 263) | 64.4 | 39.7 | 99.7 | 132.3 | |
| Yes | 9229 | 16,705 | 25,934 | ||||||
a
Children with low BIVs or modified z-score >25 (at either examination) are excluded.
b
Odds ratio represents the odds of having a high BIV at the 2nd examination among those who had a high BIV at the 1st examination vs. the odds of a high follow-up BIV among those who did not have a high initial BIV
c
Values are Ns for the cross-classification of BIVs at ages 2 y and 4 y