How do you know if you have sleep apnea? I'm 45M, BMI 38, and my wife says I snore loudly and sometimes stop breathing at night. I wake up exhausted every morning despite 7-8 hours in bed. Is it worth getting tested before or while on GLP-1 therapy?

Your symptoms are classic for OSA and you should absolutely get tested. The gold standard is in-lab polysomnography, but home sleep testing (HST) is more accessible and adequate for most patients with a high pre-test probability like yours.

Quick screening tool: the STOP-BANG questionnaire

• Snoring loudly? — Yes
• Tired/sleepy during daytime? — Yes
• Observed apneas? — Yes (wife reports)
• Pressure (blood pressure elevated)? — Unknown
• BMI >35? — Yes
• Age >50? — No (but close)
• Neck circumference >16 in (M)? — Likely at BMI 38
• Gender male? — Yes

You have at least 5/8 positive responses, which classifies you as high risk. Ask your PCP for a sleep study referral. If you start GLP-1 therapy in the meantime, a baseline AHI will allow you to quantify the improvement over time — as the OP beautifully demonstrated.

I'll add that untreated OSA significantly worsens insulin resistance and makes weight loss harder. There's a bidirectional relationship: obesity causes OSA, and OSA worsens the metabolic derangements of obesity. Breaking this cycle with GLP-1/GIP therapy addresses both simultaneously.

Don't wait for the sleep study to start GLP-1 therapy if indicated for other reasons — the metabolic benefits begin immediately. But do get the baseline sleep study so you have documentation of improvement, which matters for insurance coverage decisions down the road.

Sleep apnea is one of the most underdiagnosed conditions in the obesity population. Estimates suggest 80-90% of moderate-to-severe OSA is undiagnosed. If you have symptoms (snoring, witnessed apneas, daytime sleepiness, morning headaches, nocturia), please raise this with your healthcare provider. Treatment — whether with CPAP, weight loss, or both — can be transformative.