When is Schlaf Test actually useful?

A sleep test (e.g., polysomnography, actigraphy, or home sleep test) is actually useful when there is a clinical suspicion of a sleep disorder such as obstructive sleep apnea, insomnia, restless legs syndrome, or circadian rhythm disorder. In these cases, it provides objective data to support diagnosis and treatment planning. For healthy individuals without symptoms, a sleep test is usually not indicated because results often lack clinical relevance and may lead to unnecessary worry or interventions. Many consumer wearables or home tests measure sleep stages or quality, but their accuracy is limited and they cannot replace medical diagnosis. The evidence for the benefit of such tests in asymptomatic people is weak. Anyone experiencing sleep issues should first consult a physician before undergoing a test. Therefore, a sleep test is truly useful only in a clinical context.