I snore at night. Do I have apnea?
It is possible, but not definite. Some people snore who do not have OSA. It's even possible, though extrememly rare, for someone who has OSA to not snore. (However, if the person has excessive daytime sleepiness, he/she may have another type of sleep disordered breathing, such as upper airway resistance syndrome, or a different type of sleep disorder). Pay attention to the sound and pattern of snoring: is it a steady, regular snoring, or is it loud, frequent, and occurring in periodic bursts punctuated by periods of silence, normal breathing, and/or gasping for air? The latter is a very good indicator of OSA.
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Snoring Sleep Apnea Syndrome Back To Sleep FAQ