Testing wearable devices to measure sleep quality

Researchers want to know if simple wearable devices—like smartwatches, special headbands with brain sensors, and smartphones—can accurately detect what stage of sleep you're in. Right now, doctors use an overnight hospital test called polysomnography to diagnose sleep problems, but it's expensive and inconvenient. This study compares these wearable devices directly against that gold-standard hospital test to see if they could work for future sleep diagnosis.

Many people struggle with sleep disorders like insomnia and sleep apnea, but the current way to diagnose them requires spending a night in a sleep lab hooked up to many sensors. If wearable devices like those already in people's homes can do the job just as well, sleep testing could become easier, cheaper, and more accessible.