Table 4.
Specificity, sensitivity and likelihood ratios for each BMI-for-age Z-score threshold to predict adiposity in ninety-three healthy, prepubertal, Ladino children (aged 7–12 years), Guatemala
| BMI-for-age Z-score range* | Sensitivity | Specificity | LHRpos † | LHRneg ‡ |
|---|---|---|---|---|
| <−1·00 | 1·00 | 0·00 | 1·00 | – |
| −1·00 to −0·51 | 1·00 | 0·06 | 1·06 | 0·00 |
| −0·50 to −0·01 | 1·00 | 0·26 | 1·36 | 0·00 |
| 0·00 to 0·49 | 1·00 | 0·46 | 1·84 | 0·00 |
| 0·50 to 0·99 | 1·00 | 0·65 | 2·83 | 0·00 |
| 1·00 to 1·49 | 1·00 | 0·78 | 4·53 | 0·00 |
| 1·50 to 1·99 | 0·88 | 0·88 | 7·48 | 0·14 |
| 2·00 to 2·49 | 0·64 | 0·96 | 14·51 | 0·38 |
| 2·50 to 2·99 | 0·40 | 0·97 | 13·60 | 0·62 |
| 3·00 to 3·49 | 0·24 | 1·00 | ∞ | 0·76 |
| 3·50 to 3·99 | 0·08 | 1·00 | ∞ | 0·92 |
| ≥4·00 | 0·00 | 1·00 | ∞ | 1·00 |
LHR, likelihood ratio; pos, positive; neg, negative; BF, body fat.
*
BMI-for-age Z-score demarcation ranges according to the WHO reference( 20 ). For each range, 36 % BF is the cut-off point defining excess of adiposity implying risk profile, as revealed in Table 3.
†
Sensitivity/(1 – specificity).
‡
(1 – Sensitivity)/specificity.