Using all three body measurements together doesn't help spot kids at risk better than using just one of them alone.

For kids 8-17, these body measurements are better at correctly identifying those who don't have heart/metabolic risks (high specificity) than those who do (low sensitivity), leading to many missed cases.

For kids and teens aged 8 to 17, measuring body mass index, waist size, or waist-to-height ratio all show similar ability to spot those at risk for heart and metabolic problems, with accuracy scores between 0.70 and 0.74.

In kids 8-17, these body measurements are much better at predicting heart/metabolic risks in overweight or obese children than in those with normal weight, with stronger links in the higher weight groups.

Overweight kids 8-17 are 2.6-3.5 times more likely to have heart/metabolic risks, and obese kids are about 14 times more likely, compared to normal-weight peers.