Interrelationship between Measures Using Spearman correlation, the PHQ is trended with the SAQ (Spearman's rho = 0.56, P -value = 0.09), which is not quite statistically significant at the 0.05 level that is suggestive of more depressive symptoms in those with more severe sleep problems.
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Screening for depression, sleep-related disturbances, and anxiety in patients with adenocarcinoma of the pancreas: a preliminary study.
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