If your doctor has recommended a sleep study, there is most likely a very good reason for it. Sleep studies are often the only way to locate hidden sleep disorders that silently drain your energy, disrupt your health, and raise your risk for serious conditions like heart disease, stroke, and depression. Read on as we explain in more detail:
Why Are Sleep Studies Necessary?
Sleep studies are necessary because sleep disorders often go undetected without them. Many people assume fatigue or poor sleep is just stress or age. But in reality, conditions like obstructive sleep apnea (OSA), narcolepsy, or REM sleep behavior disorder can silently disrupt rest every night. And you may not even be aware.
A sleep study, also called polysomnography, is the gold standard for diagnosing over 80 different sleep disorders. It captures data your body gives off during sleep: brain waves, oxygen levels, heart rate, breathing, limb movements, and more. These are things your doctor can’t assess during a regular office visit. Without this data, many diagnoses remain missed or misclassified.
Take OSA, for example. The American Academy of Sleep Medicine estimates that 26% of U.S. adults betweenthe ages of 30 and 70 have obstructive sleep apnea (1). But up to 80% of moderate to severe cases are undiagnosed (2).
Why? Because symptoms like snoring, gasping, or waking up tired are often normalized. A sleep study identifies abnormal breathing patterns, oxygen drops, and arousal. Things even a seasoned clinician can’t diagnose on symptoms alone.
When Do Doctors Recommend a Sleep Study?
Doctors recommend sleep studies when there’s a clinical suspicion of a medically significant sleep disorder that can’t be fully confirmed by history or symptoms alone. Common reasons include:
- Loud, chronic snoring, choking, or witnessed apneas during sleep
- Daytime sleepiness so severe it impairs work or driving
- Difficulty falling or staying asleep, especially when medications or CBT-I haven’t helped
- Unusual nighttime behaviors like acting out dreams or sleepwalking
- Restless legs or jerking limbs during sleep
- Falling asleep suddenly during the day (suggesting narcolepsy or idiopathic hypersomnia)
Physicians also consider risk factors. If you have high blood pressure, atrial fibrillation, obesity, type 2 diabetes, or a stroke history, and poor sleep, you’re at higher risk for undiagnosed sleep apnea.
Is It Always Done in a Lab?
No. While in-lab testing is the most reliable and thorough way to do a sleep study, home sleep apnea tests (HSATs) are now widely used for patients with a high likelihood of moderate to severe OSA, no other complicating disorders, and no significant comorbidities. Home tests measure fewer variables (typically oxygen levels, airflow, breathing effort, and heart rate), but are often sufficient for straightforward cases.
However, HSATs can miss important disorders. They’re not suitable if your doctor suspects narcolepsy, parasomnias, periodic limb movement disorder, or REM behavior disorder. In these cases, a lab-based study is the only way to get accurate, comprehensive results.
Can’t You Just Treat the Symptoms Without a Sleep Study?
Not safely or effectively. Treating without a diagnosis can be risky. For example, using sleeping pills for insomnia when the true cause is OSA can worsen the condition. Prescribing stimulants for daytime sleepiness without ruling out narcolepsy can delay treatment for years.
Data matters, and sleep studies take out the guesswork. They lead to evidence-based treatment decisions, whether that’s CPAP, CBT-I, Inspire therapy, melatonin, dopaminergic therapy, or scheduled naps for narcolepsy. Without diagnostic clarity, you’re just treating symptoms, not causes.
Will It Be Uncomfortable?
Sleep studies involve equipment but are noninvasive, painless, and medically safe.
In a lab-based study, you’ll have sensors gently applied to your scalp, face, chest, and legs. These monitor brain waves, eye movement, breathing, heart rate, and muscle activity. The adhesives are medical-grade and designed to be comfortable and non-irritating. Most people can still shift positions, get up to use the bathroom, and fall asleep within an hour.
Importantly, you don’t need a full 8 hours of sleep for the study to yield results. Even 4–6 hours of data is typically enough to detect sleep apnea, movement disorders, or abnormal brain activity.
Home sleep studies are even simpler. No scalp electrodes. Just a small nasal cannula, pulse oximeter, and respiratory effort belt—easy to wear, especially if your primary concern is sleep apnea. Most people report little to no discomfort.
What Happens After the Sleep Study?
Once the study is complete, your data is reviewed by a board-certified sleep specialist—typically a physician trained in internal medicine, neurology, or pulmonology with additional training in sleep medicine. They analyze:
- Sleep stages (light, deep, REM)
- Breathing patterns and apneas
- Oxygen desaturations
- Heart rate variability
- Body movements and arousals
From this, they identify whether you have conditions like obstructive sleep apnea, central sleep apnea, insomnia, periodic limb movement disorder, REM behavior disorder, or others.
Your next appointment includes a full explanation of the results and a personalized treatment plan. This may include:
- CPAP, Inspire Therapy or oral appliance therapy (for OSA)
- CBT-I, the gold standard for insomnia
- Melatonin or bright light therapy (for circadian rhythm disorders)
- Medications or lifestyle interventions (for RLS or narcolepsy)
Every recommendation is based on objective data from your body, not assumptions or guesswork.
Are There Risks to Skipping a Sleep Study?
Yes, and they’re often underestimated. Sleep disorders don’t just impact sleep. They raise serious long-term health risks. For instance:
- Untreated OSA increases your risk of heart attack, stroke, high blood pressure, and type 2 diabetes.
- People with untreated sleep apnea are 2.5 times more likely to be involved in motor vehicle accidents.
- Chronic insomnia is linked to depression, anxiety, weakened immune function, and increased dementia risk.
- Narcolepsy, when undiagnosed, can impair safety, work, and mental health for years.
Skipping a sleep study means staying in the dark. It means treating symptoms with over-the-counter sleep aids, trial medications, or habits that may not work, or worse, mask the real problem.
We Make Sleep Studies Simple and Life-Changing
The Insomnia and Sleep Institute of Arizona removes the hassle and hesitation from sleep testing. From first call to final results, you’re guided by board-certified sleep medicine physicians and highly trained staff who know how to find answers and deliver real results.
We provide both full in-lab sleep studies and home sleep apnea testing—based on what works best for your situation. Our sleep centers are quiet, private, and designed for comfort. No cold, clinical setup. Just the best technology available, in a space that lets you rest.
Thousands have come to us after months or even years of poor sleep. Many believed it was stress or age. Most left with clear answers and better nights.
Don’t waste time guessing. Contact us now. Let’s find out what’s disrupting your sleep and fix it for good.
References
- Kingshott, R. (2014, September 29). Rising prevalence of sleep apnea in U.S. threatens public health – American Academy of Sleep Medicine – Association for Sleep Clinicians and Researchers. American Academy of Sleep Medicine – Association for Sleep Clinicians and Researchers. https://aasm.org/rising-prevalence-of-sleep-apnea-in-u-s-threatens-public-health/
- Faria, A., Allen, A. H., Fox, N., Najib Ayas, & Laher, I. (2022). The public health burden of obstructive sleep apnea. DOAJ (DOAJ: Directory of Open Access Journals), 14(3), 257–265. https://doi.org/10.5935/1984-0063.20200111
Disclaimer: The information provided in this blog post is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always consult with a licensed healthcare provider for recommendations specific to your individual health needs.
