Impact of Shift Work and Race/Ethnicity on the Diurnal Rhythm of Blood Pressure and Catecholamines

Among 37 African American women and 62 women of other races, 79% of evening or night shift workers were nondippers in blood pressure.

• Evening and night shift workers exhibited a 5.4 mm Hg smaller drop in systolic blood pressure compared to day shift workers.
• African American women experienced a 4.0 mm Hg smaller drop in blood pressure than women of other races.
• The odds of being a nondipper were 6.1 times higher for evening and night shift workers compared to day shift workers.
• African American women had 7.1 times higher odds of being nondippers compared to other racial groups.
• Total sleep time was significantly greater in non-African American day shift workers than in the other groups.
• Longer sleep times predicted less dipping in blood pressure, regardless of work shift and race/ethnicity.

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