![]() After the sum is tallied, the higher the score, the worse the person’s sleep quality. ![]() Habitual sleep efficiency, or the percentage of time you’re actually sleeping in bedĪggregated scores range from zero to three points for each question.Sleep duration and use of sleep medications.Sleep latency, or how long it takes to fall asleep once the lights are out.For example, some questions are based on a sliding scale, while others are open-ended. ![]() This self-report comprises 19 questions with varying response formats. The PSQI assesses a person’s quality of sleep. These are: No insomnia (score of 0-7), Subthreshold insomnia (score of 8-14), Moderate insomnia (score of 15-21), and Severe insomnia (score of 22-28). There are four severity categories assigned to insomnia.
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