'White Coat Effect' Is Smaller for Nurses Than Doctors
Mean blood pressures lower for nurses compared to readings made by doctors at same visit
FRIDAY, March 28, 2014 (HealthDay News) -- Doctors' readings of blood pressure are often higher than measurements made by nurses at the same visit, according to research published in the April issue of the British Journal of General Practice.
Christopher E. Clark, Ph.D., from the University of Exeter in the United Kingdom, and colleagues conducted a systematic literature review to identify studies of adults reporting mean blood pressures measured by doctors and nurses at the same visit.
The researchers found that, based on 15 studies (11 hypertensive; four mixed hypertensive and normotensive populations), nurse-measured blood pressures were lower compared with doctors' measurements (weighted mean differences: systolic −7.0 mm Hg, diastolic −3.8 mm Hg). Differences were lower in studies at low risk of bias (systolic −4.6 mm Hg; diastolic −1.7 mm Hg). Doctors' readings were more frequently used than nurses' readings to diagnose white coat hypertension (relative risk, 1.6).
"This systematic difference has implications for hypertension diagnosis and management," the authors write.