Document Detail

Impact of shift work and race/ethnicity on the diurnal rhythm of blood pressure and catecholamines.
MedLine Citation:
PMID:  9740605     Owner:  NLM     Status:  MEDLINE    
To evaluate the effects of shift work and race/ethnicity on the diurnal rhythm of blood pressure and urinary catecholamine excretion of healthy female nurses, 37 African American women and 62 women of other races underwent ambulatory blood pressure monitor and urine collection for 24 hours that included a full work shift: day shift (n=61), evening shift (n=11), and night shift (n=27). Awake and sleep times were evaluated from subjects' diaries. Of African Americans, 79% who were working evenings or nights and 32% working day shifts were nondippers (<10% drop in systolic pressure during sleep), whereas only 29% of others working evening+night and 8% working day shifts were nondippers. Regression analyses indicated that evening+night shift workers had a 5.4 mm Hg (P<0.001) smaller drop than day shift workers, and African Americans had a 4.0 mm Hg (P<0.01) smaller drop than others. The odds of an evening+night shift worker being a nondipper were 6.1 times that of a day shift worker (P<0.001), and the odds of an African American were 7.1 times that of others (P<0.001). Total sleep time was significantly greater in the non-African American day shift workers than in the other 3 groups. After controlling for work shift and race/ethnicity, we determined that longer sleep times predicted less dipping (absolute and relative) in blood pressure. Urinary norepinephrine and epinephrine were higher during work than nonwork in both racial groups of day shift workers, but in evening+night shift workers the difference was small and in the opposite direction. These results indicate that being African American and working evening or night shifts are independent predictors of nondipper status. Higher sleep blood pressure may contribute to the known adverse effects of shift work.
F Yamasaki; J E Schwartz; L M Gerber; K Warren; T G Pickering
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Hypertension     Volume:  32     ISSN:  0194-911X     ISO Abbreviation:  Hypertension     Publication Date:  1998 Sep 
Date Detail:
Created Date:  1998-10-15     Completed Date:  1998-10-15     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7906255     Medline TA:  Hypertension     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  417-23     Citation Subset:  IM; S    
From the Hypertension Center and the Department of Public Health, The New York Hospital-Cornell Medical Center, New York, NY 10021, USA.
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MeSH Terms
African Americans
African Continental Ancestry Group*
Blood Pressure*
Blood Pressure Monitoring, Ambulatory
Catecholamines / urine*
Circadian Rhythm*
Cohort Studies
European Continental Ancestry Group*
Middle Aged
New York
Regression Analysis
Time Factors
Work Schedule Tolerance / physiology*
Grant Support
Reg. No./Substance:

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