for sleep apnea, you can also just observe your child as they sleep. My son had severe sleep apnea at age 3 1/2 years- when he took a nap, he would quit breathing for 20-30 seconds. Yikes! I videotaped it to show the ENT. They took out his tonsils and adenoids, and that went away. Getting an audiology exam in the soundproof room is always a good idea, not a simple "screen."