Who Gets Sleep Apnea? Risk Factors You Can and Can't Change

Sleep apnea doesn't strike at random. Decades of research have mapped out a clear set of risk factors — some baked into your biology and others shaped by daily habits. Understanding which is which helps you gauge your own odds, know when to get tested, and take meaningful action on the parts you actually control.

This guide breaks down the major risk factors for obstructive sleep apnea (OSA), the most common form, where the throat muscles relax and the airway repeatedly collapses during sleep. For the bigger picture on what the condition is and how it's measured, start with our overview of Understanding Sleep Apnea, or read What Is Sleep Apnea? for types and severity.

Risk factors you can't change — sex, age, family history, anatomy

Some risk factors are fixed. Knowing you carry them doesn't mean you're destined for sleep apnea, but it does mean you should pay closer attention to symptoms and screening.

Male sex

Men are roughly two to three times more likely to develop OSA than premenopausal women. The gap narrows after menopause, when women's risk rises closer to men's — likely tied to hormonal changes and shifts in fat distribution. Women also tend to report different symptoms (fatigue, insomnia, mood changes) rather than the classic loud snoring, which means OSA in women is more often missed.

Increasing age

Risk climbs steadily with age as muscle tone in the airway decreases and soft tissue changes. Importantly, the increase tends to level off after the 60s and 70s — it isn't a straight line that keeps rising indefinitely. Sleep apnea is common in middle and older age, but it can affect younger adults and even children too.

Family history and genetics

Sleep apnea does run in families. If close relatives have OSA, your risk is higher — partly through inherited traits like the shape of your jaw, the size of your airway, and how your body distributes weight. Genetics also influences ventilatory control, the brain's regulation of breathing. So "is sleep apnea genetic?" has a nuanced answer: there's no single sleep-apnea gene, but the anatomical and physiological building blocks are heritable.

Craniofacial and airway anatomy

The physical structure of your head, neck, and airway plays a large role:

• A recessed or small lower jaw (retrognathia) or a smaller airway
• A large tongue, large tonsils, or a low-hanging soft palate
• A thick or large neck circumference
• Nasal structural issues like a deviated septum

These features can crowd the airway and make collapse during sleep more likely — which is why two people at the same weight can have very different risk.

Risk factors you can influence — weight, smoking, alcohol/sedatives, nasal congestion

Here's the encouraging part: several of the strongest contributors are modifiable.

A few notes worth keeping in mind:

• Alcohol and sedatives (including some sleep aids and opioids) deepen muscle relaxation in the throat, which can turn mild snoring into full apneas. Never stop or change a prescribed medication on your own — talk to the prescriber.
• Chronic nasal congestion is an underrated driver. Persistent stuffiness from allergies, sinus problems, or a deviated septum forces mouth breathing and raises OSA risk about twofold. If you already use CPAP, congestion can also undermine your therapy — see CPAP Nasal Congestion and Stuffy Nose for fixes.
• Smoking is the only major risk factor that is both common and entirely avoidable; current smokers carry meaningfully higher OSA risk than nonsmokers.

Why excess weight matters

Of all the modifiable factors, excess weight — particularly obesity — is the single most influential. Roughly half to a majority of OSA cases are linked to it, and the relationship is direct and mechanical.

Fat deposits around the neck and throat physically narrow the airway, so it takes less muscle relaxation during sleep for the walls to collapse. Fat around the abdomen reduces lung volume, which further destabilizes breathing at night. The connection runs both ways, too: poor, fragmented sleep disrupts the hormones that regulate appetite and metabolism, which can make weight gain easier — a self-reinforcing loop.

The good news is that this loop can be broken. Weight loss often reduces apnea severity, and in some people with milder disease it can dramatically lower the number of nightly events. But how much weight to lose, how to lose it safely, and whether it changes your therapy needs are decisions to make with your doctor — not goals to chase on your own, and not a reason to stop prescribed treatment before a clinician confirms it's appropriate.

Excess weight is also part of why sleep apnea so often travels with other conditions. OSA is associated with — and an independent risk factor for several of — high blood pressure, atrial fibrillation, and stroke, and it's also linked to type 2 diabetes. Our guide to Sleep Apnea and Your Heart covers those connections, and Untreated Sleep Apnea Risks explains why the numbers are worth taking seriously.

From risk awareness to testing to monitoring

Recognizing your risk factors is step one. Here's how to turn that awareness into action.

Step 1: Watch for symptoms

Risk factors plus symptoms is the combination that should prompt a conversation with your doctor. Classic signs include loud habitual snoring, witnessed pauses in breathing, gasping or choking awakenings, and daytime sleepiness. Our Sleep Apnea Symptoms guide has the full list, and When to See a Doctor About Snoring helps you decide when it's time.

Step 2: Get tested

Diagnosis requires a sleep study, not a self-assessment. Per the AASM Clinical Practice Guideline for Diagnostic Testing for Adult OSA (Kapur et al., 2017), a home sleep apnea test (HSAT) with an adequate device can be used for uncomplicated adults whose signs and symptoms indicate an increased risk of moderate-to-severe OSA.

In-laboratory polysomnography (PSG) is recommended instead of a home test for people with significant heart or lung disease, possible respiratory muscle weakness from a neuromuscular condition, suspected hypoventilation, chronic opioid use, a history of stroke, or severe insomnia — and PSG is required to diagnose central sleep apnea or hypoventilation. If a home test comes back negative, inconclusive, or technically inadequate, a lab study should follow. See In-Lab PSG vs Home Test for what each involves.

Step 3: Monitor your therapy

If you're diagnosed and start CPAP, the question shifts from "am I at risk?" to "is my treatment actually working?" That's measured by your residual AHI — the apnea-hypopnea index, or average number of breathing events per hour, that remain while you're on therapy. A residual AHI below 5 events per hour is the widely used benchmark for effective treatment; some clinicians aim lower (around 1–2) when it's comfortably achievable, but targets are individualized with your provider. Learn more in What Is a Good AHI on CPAP?.

This is where single nights mislead and trends tell the truth. One restless night with a higher AHI is normal noise; what matters is the pattern over weeks. Knowing your risk is step one — once you start therapy, SomniCharts gives you an objective way to see whether it's working night after night. It imports data from ResMed, Philips Respironics (including the encrypted DreamStation 2), and Löwenstein prisma machines and explains your AHI, mask leak, and pressure trends in plain language automatically — so you can walk into your next appointment with evidence, not guesses. (Heads-up: a high mask leak can invalidate or under-report your AHI, which is exactly the kind of thing a clear data view catches — more in CPAP Leak Rate.)

You can't change your sex, age, family history, or jaw shape — but you can act on weight, smoking, alcohol, and congestion, get properly tested, and then keep a steady eye on whether your therapy is doing its job.

Frequently asked questions

Is sleep apnea genetic?

There's no single gene for sleep apnea, but it does cluster in families. Inherited traits like jaw and airway shape, fat distribution, and the brain's control of breathing all influence risk, so a strong family history raises your odds.

Who is most at risk for sleep apnea?

The highest-risk profile combines fixed factors (male sex, older age, family history, crowded airway anatomy) with modifiable ones (excess weight, smoking, alcohol or sedative use, and chronic nasal congestion). Excess weight is the single strongest contributor.

Does losing weight cure sleep apnea?

Weight loss often reduces apnea severity and, in milder cases, can substantially lower nightly events — but results vary and it isn't guaranteed to eliminate the condition. Discuss any weight-loss plan and changes to your therapy with your doctor.

Can you get sleep apnea if you're not overweight?

Yes. Anatomy, age, genetics, and nasal obstruction can cause OSA even at a normal weight, which is why two people of the same size can have very different risk. Symptoms in lean individuals are often attributed to anatomy rather than weight.