| Diagnostic criteria A-D must be met: | |
| A | The patient or caregiver reports a chronic or recurrent pattern of irregular sleep and wake episodes throughout the 24-hour period, characterized by symptoms of insomnia during the scheduled sleep period (usually at night), excessive sleepiness (napping) during the day, or both. |
| B | Symptoms are present for at least three months. |
| C | Sleep log and, whenever possible, actigraphy monitoring for at least seven days, preferably 14 days, demonstrate no major sleep period and multiple irregular sleep bouts (at least three) during a 24-hour period. |
| D | The sleep disturbance is not better explained by another current sleep disorder, medical or neurological disorder, mental disorder, medication use, or substance use disorder. |
