Sleep apnea affects some 18 million people. About one in 10 adults reported experiencing pauses in breathing during sleep. Snoring can be a symptom of sleep apnea. About 59% of adults said they snore, according to NSF's 2005 Sleep in America poll; about one fourth of those who snore do so every night or almost every night. Untreated sleep pnea may cause 3.4 billion in additional medical costs.