Which of the following best describes insomnia disorder?

Insomnia disorder is characterized by difficulty falling asleep, maintaining sleep, or waking up too early and not being able to return to sleep, which occurs at least three times a week. This persistent difficulty is typically associated with significant distress or impairment in daytime functioning. The frequency of sleep-related issues is a key feature of this disorder, distinguishing it from other sleep problems.

The emphasis on the occurrence of sleep difficulties at least three times a week is critical to making a formal diagnosis of insomnia disorder as per the DSM-5-TR criteria. This ensures that the problem is not a one-time occurrence or occasional sleep disruption but rather a chronic issue that likely warrants professional evaluation and treatment.

While other options touch on aspects of sleep and daytime functioning, they do not encompass the full definition or diagnostic criteria for insomnia disorder as established in the DSM-5-TR. Consequently, the description that highlights ongoing difficulties with sleep at least three times weekly aligns accurately with the standards set for this specific disorder.