Assertion: sleep disturbance | /r/HasProperty | sleep disturbances
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Source sentences:
text: A 2019 study investigated the three above-mentioned sleep disturbances in schizophrenia-spectrum (SCZ) and bipolar (BP) disorders in 617 SCZ individuals, 440 BP individuals, and 173 healthy controls (HC), sleep disturbances being identified using the Inventory for Depressive Symptoms - clinician rated scale (IDS-C).