Picture someone with sleep apnea and the image that likely comes to mind is an older man asleep on a couch, snoring loudly enough to rattle the windows. That image, as familiar as it is, has become one of the most harmful misconceptions in women’s health and according to sleep medicine experts, it may be costing women their lives.
Obstructive sleep apnea, or OSA, is a condition in which the upper airway repeatedly collapses during sleep, blocking airflow to the lungs. For decades, the disease was studied almost exclusively in men, meaning the symptoms used to diagnose it loud snoring, dramatic gasps for air were defined by how it presents in men. Women, it turns out, often experience it entirely differently. And the medical system has been slow to catch up.
Why sleep apnea looks different in women
Women with OSA are more likely to experience nightmares, frequent nighttime wakings, insomnia, morning headaches, mood swings and persistent daytime fatigue. These symptoms are easy to attribute to other causes stress, hormones, depression which is exactly why so many cases go undetected.
Biology plays a significant role in these differences. Women generally have smaller, more structurally stable airways that are less prone to the kind of collapse that produces the signature snoring associated with OSA. Women also tend to carry less fat around the neck, a known risk factor, and before menopause, the hormones estrogen and progesterone appear to offer a degree of protection by supporting respiratory function during sleep.
The result is that women are more likely to experience what researchers call hypopneas shallow breaths with reduced oxygen flow rather than the complete pauses in breathing, or apneas, more commonly seen in men. It’s a distinction that matters enormously in how the condition is detected and measured.
The diagnosis gap is wide and dangerous
Men make up roughly 59% of OSA patients in the United States, while women account for about 41%. But those numbers shift dramatically after menopause. As estrogen and progesterone levels decline, the rate of OSA in women rises sharply, with studies suggesting that between 47% and 67% of postmenopausal women have the condition roughly the same prevalence as men over 50. Yet the number of women who actually receive a diagnosis remains far lower.
Research suggests men are nine times more likely to be referred for sleep apnea diagnostic testing than women presenting with comparable complaints. When a woman reports poor sleep and daytime fatigue to her doctor, she is frequently sent home with a referral for depression, anxiety or insomnia rather than a sleep study. When OSA is suspected in men with similar symptoms, diagnostic testing tends to follow quickly.
Part of the problem is structural. The diagnostic criteria for OSA were built around how the disease presents in men. A formal diagnosis currently requires either a significant drop in blood oxygen levels or a brief awakening from sleep tied to a breathing event. Women tend not to experience the same steep oxygen drops as men, meaning their symptoms can fall just below the threshold that triggers a diagnosis even when they are genuinely suffering. Medicare compounds this issue by only recognizing a sleep apnea diagnosis tied to those deep oxygen drops, effectively baking a male-centric standard into insurance coverage for millions of older Americans.
Home sleep tests, which are growing in popularity as a more accessible alternative to in-lab studies, are also less reliable for women. Because women tend to have fewer and milder events, these at-home monitors may undercount the severity of the condition. For women who also have insomnia and spend significant time in bed not sleeping, the monitor may record data from only a fraction of the night, making the condition appear less severe than it actually is.
What happens when it goes untreated
Sleep apnea is not a condition to ignore, and the downstream health consequences for women are serious. Each time breathing stops during sleep, the body releases adrenaline to trigger waking a stress response that, repeated night after night over years, places significant strain on the cardiovascular system. This chronic stress is linked to elevated risk for high blood pressure, heart attack, stroke, irregular heartbeat and heart failure.
Some research suggests that women with severe sleep apnea may face higher rates of cardiovascular complications than their male counterparts. Women also tend to have more coexisting health conditions at the time of diagnosis than men do, including thyroid disease, asthma and depression all of which can both mask and worsen OSA.
Beyond the heart, untreated sleep apnea is associated with cognitive decline, memory problems and reduced daytime alertness, which raises the risk of accidents, particularly in high stakes occupations. There is also growing evidence that treating OSA can meaningfully improve symptoms of anxiety and depression in people who have both conditions simultaneously.
The encouraging counterpoint, experts say, is that women appear to benefit from sleep apnea treatment at least as much as men possibly more.
How to advocate for a diagnosis
Getting a diagnosis as a woman requires knowing what to look for and being prepared to push for answers.
Persistent daytime sleepiness, difficulty concentrating, waking frequently during the night and morning headaches are all symptoms worth bringing to a doctor’s attention at any age. Snoring, even if mild or infrequent, should not be dismissed or minimized out of embarrassment. Keeping a sleep diary that tracks how rested one feels upon waking and throughout the day can provide a doctor with useful evidence.
When primary care providers do not take concerns seriously or default to attributing symptoms to other causes, requesting a referral to a sleep medicine specialist is entirely appropriate. Sleep medicine specialists are best positioned to recommend the right diagnostic tests and explain the full range of treatment options available, regardless of how the condition presents.
