Researchers at the University of Chicago have come up with a test that can determine if a child is in danger from snoring.
In a test conducted at the university, it was found that some of 90 children who had been referred to a clinic to be evaluated for breathing problems in sleep, had obstructive sleep apnoea.
In a simple urine test a number of proteins were increased in the urine of the children diagnosed with dangerous snoring.
The test found three proteins at higher concentrations in the urine of children with OSA: urocortin 3, orosomucoid and uromodulin.
The research is published in the American Journal of Respiratory and Critical Care Medicine.
OSA can lead to mental, behavioural, cardiovascular and metabolic problems in children.
It has been estimated that up to 3% of all children up to the age of nine may suffer from it.