Sleep Apnea Testing: At-Home vs. In-Lab Sleep Studies
Loud snoring, waking up gasping, or feeling exhausted after a full night in bed can all be signs of sleep apnea. But the only way to know what’s happening while you sleep is to measure it.
Sleep apnea testing records your breathing, oxygen levels, and other body signals during sleep to identify interruptions in breathing. At Rebis Health, that test might be a small ring worn on your finger in your own bed, or an overnight study in one of our Colorado sleep centers.
Here’s how each option works, how we choose between them, and what happens after.
At-Home vs. In-Lab Sleep Study: What’s the Difference?
The main difference is how much each test measures. An at-home sleep study focuses on breathing-related signals and oxygen. An in-lab sleep study also records brain activity, heart rhythm, and muscle movement, with a technologist watching all night.
At-home sleep studyIn-lab sleep studyWhereYour own bedPrivate room in Westminster, Longmont, or FriscoEquipmentOne ring on your fingerSensors on scalp, face, chest, and legs, plus beltsMeasuresFinger blood flow signals, oxygen, pulse, estimated sleepBrain waves, eye and leg movements, heart rhythm, airflow, breathing effort, oxygen, positionMonitoringData reviewed by our scoring teamTechnologist monitors all nightBest forSelected adults with suspected sleep apneaComplex symptoms, other sleep disorders, unclear home resultsMain advantageConvenience and familiar surroundingsThe most complete diagnostic picture
The right test depends on your symptoms, age, health history, and what your provider needs to learn.
When Should You Consider Sleep Apnea Testing?
Common reasons to schedule a sleep apnea evaluation include:
Loud, frequent snoring
Gasping, choking, or pauses in breathing that a partner notices
Waking up tired after a full night in bed
Daytime sleepiness
Morning headaches
Trouble concentrating or remembering things
Restless or frequently interrupted sleep
Not everyone who snores has sleep apnea, and not everyone with sleep apnea snores. That’s why every test at Rebis starts with an evaluation by a provider, who reviews your symptoms, history, and medications, then orders the test most likely to give you a reliable answer.
How Does an At-Home Sleep Apnea Test Work?
At Rebis, an at-home sleep study uses the SleepImage Ring, a single ring worn on your finger overnight. There are no nasal tubes, chest belts, or wires. For most adults, it’s a one-night test.
What the ring measures: changes in blood flow signals in your finger, your oxygen levels throughout the night, your pulse, and an estimate of when you’re asleep or awake. Together, these signals help identify the breathing events linked to sleep apnea.
What to expect:
Get your ring. Pick it up at a Rebis location, or have it mailed to you.
Get set up. Our team shows you how to use the ring and helps you set up the SleepImage app on your phone. No smartphone? A loaner tablet may be available.
Sleep in your own bed. At bedtime, put on the ring and start the study in the app.
Answer two short questionnaires, one in the evening and one in the morning.
Return the ring following the instructions from our team.
We check every recording before it’s interpreted. Our scoring team reviews home studies daily. Each one needs at least four hours of data with strong signal quality. If a night falls short, we’ll contact you to repeat it.
Is an at-home sleep apnea test accurate?
For appropriately selected adults with suspected sleep apnea, a home sleep apnea test can be a reliable diagnostic option. It isn’t the right fit for everyone.
Because it records fewer signals than a lab study and estimates sleep rather than measuring brain waves, a home test can underestimate mild sleep apnea. It also can’t diagnose conditions like narcolepsy, periodic limb movements, or acting out dreams. If your home results are normal but your symptoms still point to sleep apnea, your provider may recommend an in-lab sleep study.
What Happens During an In-Lab Sleep Study?
An in-lab sleep study, called polysomnography (PSG), is the gold standard for diagnosing sleep disorders. Rebis has sleep centers in Westminster, Longmont, and Frisco.
What’s recorded: brain waves, eye movements, muscle activity in your chin and legs, heart rhythm, breathing effort, airflow, snoring, oxygen levels, and body position. A sleep technologist monitors you in real time from a separate control room, and the study is video and audio recorded.
What is it like to sleep in a sleep lab?
A technologist greets you, walks you to your private room, and explains each step. You’ll have time to change, ask questions, and settle in before sensors are placed. The room has no clocks and the blinds are drawn, so time cues won’t disrupt your sleep.
You can move and change positions during the night. If you need the restroom, the sensors unplug from a small portable box. Wake-up is usually around 6 a.m., and showers are available before you head out. Most patients sleep enough for a useful study, even if the night feels different from home.
How should you prepare for an in-lab sleep study?
Avoid caffeine (coffee, tea, soda, chocolate) after noon, and skip alcohol unless your provider says otherwise.
Arrive with clean, dry hair, and skip hair products and heavy lotions.
Bring two-piece pajamas, toiletries, a change of clothes, and your own pillow if you’d like.
Bring a list of your medications. Bring any sleep medications too, but don’t take them before driving.
Already use CPAP? Bring your mask and leave the machine at home.
Never stop a prescribed medication unless your provider tells you to.
What Is a Split-Night Sleep Study?
A split-night sleep study combines diagnosis and a first trial of CPAP in a single night. If you have enough breathing events in the first part of the night to meet clinical criteria, the technologist starts CPAP for the rest of the study. If the criteria aren’t met, the night is completed as a standard diagnostic study.
Rebis also performs overnight therapy studies to fine-tune settings for CPAP, BiPAP, and adaptive servo-ventilation (ASV).
What Other Sleep Tests Does Rebis Offer?
Not every sleep problem is sleep apnea. For persistent daytime sleepiness, your provider may recommend one of these daytime tests:
Multiple Sleep Latency Test (MSLT): the main test for narcolepsy and idiopathic hypersomnia. After an overnight study, you take five scheduled naps, two hours apart, while we measure how quickly you fall asleep and whether REM sleep appears.
Maintenance of Wakefulness Test (MWT): measures how well you stay awake. You sit in a quiet, dim room for four 40-minute sessions. It’s used to check how well treatment is working and is sometimes required for safety-sensitive jobs.
Can Children Have Sleep Studies?
Yes. Rebis offers pediatric sleep evaluations and in-lab sleep studies for children ages 3 to 17.
Children experience sleep-disordered breathing differently than adults. Signs can include snoring, mouth breathing, restless sleep, and daytime behavior or attention challenges. And while parents often ask about it, a tongue tie on its own does not cause sleep apnea in children.
For kids, an in-lab sleep study is the standard test when sleep apnea is suspected. A parent or guardian stays at the sleep center the entire night, children are encouraged to bring a comfort item, and our technologists take extra time during setup so kids feel safe. Younger children also receive additional breathing monitoring.
In some cases, a Rebis provider may recommend a three-night home sleep study as part of a child’s evaluation. Your provider will explain which approach fits your child.
How Are Sleep Apnea Test Results Interpreted?
A sleep apnea diagnosis is based on more than one number. For adults, the most common measure is the Apnea-Hypopnea Index (AHI): the average number of times per hour breathing stops or becomes shallow.
Adult AHI (events per hour)ClassificationFewer than 5Normal5 to 14.9Mild sleep apnea15 to 29.9Moderate sleep apnea30 or moreSevere sleep apnea
These categories apply to adults; children are evaluated using different thresholds. Home tests estimate these events from fewer signals than a lab study, so your physician considers the type of test, your oxygen patterns, symptoms, and health history together.
Why does altitude matter for sleep apnea testing in Colorado?
Rebis patients live at elevations from about 4,500 to over 9,000 feet, where baseline oxygen levels naturally run lower. Our physicians account for altitude when interpreting your results, so your numbers are read in the context of where you actually live and sleep.
Do Commercial Drivers Need Sleep Apnea Testing?
Some commercial drivers are referred for DOT sleep apnea testing as part of medical certification. Requirements depend on your situation and your medical examiner’s recommendations.
Rebis offers sleep apnea evaluations, testing, and the Maintenance of Wakefulness Test, which is sometimes required for commercial driving. If you’ve been referred, bring any paperwork from your examiner so our team can help clarify what you need.
What Happens After Your Sleep Apnea Test?
Your study is scored by our team and interpreted by a Rebis physician. Results are usually ready within 7 to 10 business days. Your provider then reviews them with you at a follow-up visit, which is scheduled when you book your test.
If you’re diagnosed with sleep apnea, your treatment plan may include:
CPAP or other positive airway pressure therapy through our CPAP Clinic
Oral appliance therapy through Airway Dentistry
Further airway or medical evaluation to understand contributing factors
Functional medicine and lifestyle support when appropriate
Because Rebis brings sleep medicine, airway dentistry, and functional medicine together, these pieces are coordinated by one team.
Where Can You Get Sleep Apnea Testing in Colorado?
Rebis Health offers sleep medicine at four Colorado locations, plus virtual visits for Colorado residents:
Lone Tree: Denver’s south metro
Westminster: north Denver metro (sleep lab on site)
Boulder/Longmont: Boulder County and the northern Front Range (sleep lab on site)
Frisco: Summit County and the mountain communities (sleep lab on site)
Home sleep tests can be picked up at a Rebis location or mailed to you. Whether you’re looking for a sleep study in Denver or sleep apnea care in Boulder, learn more about sleep testing at Rebis.
Frequently Asked Questions About Sleep Apnea Testing
Can a home sleep test diagnose sleep apnea?
Yes. A home sleep apnea test ordered by a provider can diagnose obstructive sleep apnea in appropriately selected adults. It isn’t designed to diagnose every sleep disorder.
Is an in-lab sleep study more accurate than a home sleep test?
An in-lab study records more signals, including brain activity and sleep stages, so it gives the most complete picture. It’s preferred for complex cases, while home testing works well for many adults with suspected sleep apnea.
How many hours do I need to sleep for a home sleep test?
At Rebis, a home study needs at least four hours of good-quality data. If your recording falls short, we’ll contact you to repeat it.
Can sleep apnea be missed on a home sleep study?
Yes, especially mild sleep apnea. If your symptoms are strong despite a normal home result, your provider may recommend an in-lab study.
Do I have to sleep all night during an in-lab study?
No. Most patients get enough sleep for a meaningful study, even if the night feels different from home.
How long does it take to get sleep study results?
Reports are usually ready within 7 to 10 business days, and your provider reviews them with you at your follow-up visit.
Can children be tested for sleep apnea?
Yes. Rebis offers in-lab sleep studies for children ages 3 to 17, with a parent or guardian staying overnight.
What happens if I test positive for sleep apnea?
Your provider reviews the type and severity with you and builds a treatment plan, which may include CPAP, an oral appliance, or other coordinated care.
Better Sleep Begins With Understanding Why
Sleep apnea testing isn’t just about counting how often your breathing changes at night. It’s the first step in understanding what’s disrupting your sleep and what will help.
Awaken. Empower. Heal.
Schedule your sleep evaluation with Rebis Health
Educational content only. Not medical advice.
Sources
Kapur VK, et al. Clinical practice guideline for diagnostic testing for adult obstructive sleep apnea. Journal of Clinical Sleep Medicine. 2017;13(3):479–504.
Kirk V, et al. AASM position paper for the use of a home sleep apnea test for the diagnosis of OSA in children. Journal of Clinical Sleep Medicine. 2017;13(10):1199–1203.
