Assertion: sleep apnea's doctor | /r/CapableOf | count in a sleep study
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Source sentences:
text: In a sleep study, doctors count pauses in breathing to determine whether the patient has mild sleep apnea, characterized by five to 15 episodes per hour; moderate sleep apnea, defined by 15 to 30 per hour; or severe sleep apnea, meaning more than 30 each hour.