title: The effect of depression on sleep quality and the circadian rhythm of ambulatory blood pressure in older patients with hypertension.
abstract: OBJECTIVE
  To explore the effect of depression on the sleep quality, and the circadian rhythm of ambulatory blood pressure in patients with essential hypertension.
  
  
  METHODS
  A total of 73 older patients with hypertension were screened for depression and divided into two groups. The Pittsburgh Sleep Quality Index (PSQI) and the circadian rhythm of ambulatory blood pressure were compared between the non-depressed (control) and depressed (case) group.
  
  
  RESULTS
  In the case group, 24h ambulatory SBP and DBP, and nocturnal SBP and DBP were higher than in the control group, and the circadian rhythm of non-dipper was higher (67.22% vs 40.13%，P<0.01). There was a positive correlation between PSQI and depression (r=0.432, P<0.01).
  
  
  CONCLUSIONS
  There was a significant correlation between sleep quality and depression in older patients with hypertension. Depression increases the circadian rhythm of non-dipper in older patients with hypertension.
authors.affiliation: Department of Geriatrics, Xuanwu Hospital Capital Medical University, China National Clinical Research Center for Geriatric Medicine, Beijing 100053, China.
authors.forename: Lina
authors.initials: L
authors.lastname: Ma
authors.affiliation: Department of Geriatrics, Xuanwu Hospital Capital Medical University, China National Clinical Research Center for Geriatric Medicine, Beijing 100053, China. Electronic address: liy_xw@sina.com.
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001794:Blood Pressure / Q000502:physiology; D018660:Blood Pressure Monitoring, Ambulatory / Q000523:psychology; D002940:Circadian Rhythm / Q000502:physiology*; D003863:Depression / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology; D008297:Male; D008875:Middle Aged; D012890:Sleep / Q000502:physiology; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology
keywords: Circadian rhythm; Depression; Hypertension; Older; Sleep quality