Young children who snore or have trouble sleeping through the night are more likely to need special education, a new study shows.

Researchers looked at more than 11,000 children in southwest England. They found that breathing problems during sleep, such as snoring, or problems such as regularly refusing to go to bed, waking up in the night, and having nightmares through age 5 were associated with a greater chance of needing special education at age 8.

Overall, breathing problems during sleep were linked to a nearly 40% increased risk of needing special education. Children with the worst breathing problems had a 60% greater need for special education.