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A useful formula for estimating patients at high risk for moderate to severe Obstructive Sleep Apnea (OSA): Patients at high risk for moderate to severe OSA have symptoms of OSA, including excessive daytime sleepiness and an Adjusted Neck Circumference > 43 cm (17 inches)
- Symptoms of OSA = snoring, pauses in breathing while sleeping, or complaints of daytime sleepiness
- Presence of excessive daytime sleepiness = Epworth sleepiness scale >10
- Adjusted neck circumference = neck circumference + 4 cm (if hypertension present) + 3 cm (if habitual snorer) + 3 cm (if reported to choke or gasp most nights)
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