Can blood pressure measurements taken in the physician's office avoid the 'white coat' bias?

Area of Science:

• Cardiovascular Medicine
• Hypertension Research
• Diagnostic Accuracy

Background:

• Accurate blood pressure (BP) measurement is essential for diagnosing hypertension.
• Clinic BP (CBP) readings are prone to 'white coat' bias, while ambulatory BP monitoring (ABP) and home BP (HBP) monitoring offer better cardiovascular disease prediction but have limitations.
• There is a need for feasible in-office BP measurement techniques that improve diagnostic accuracy.

Purpose of the Study:

• To evaluate nonclinical BP measurement (NCBP) as an alternative to traditional clinic BP (CBP) and home BP (HBP) monitoring for improving diagnostic accuracy.
• To compare the agreement of NCBP, CBP, and HBP with ambulatory BP monitoring (ABP), considered the gold standard for cardiovascular disease prediction.

Main Methods:

• Auscultatory BP was measured by trained technicians in a nonclinical setting (NCBP) for 249 patients.
• The same patients subsequently had their BP measured in a clinical setting (CBP), used an HBP monitor, and underwent 36-hour ABP monitoring.
• Statistical models were used to assess the agreement between NCBP, CBP, HBP, and ABP.

Main Results:

• Home BP (HBP) and nonclinical BP (NCBP) explained 94% and 87% of the variance in systolic and diastolic ambulatory BP (ABP), respectively.
• The agreement between NCBP and ABP was significantly higher than that between CBP and ABP, or HBP and ABP.
• NCBP demonstrated superior accuracy in predicting ABP compared to CBP and HBP.

Conclusions:

• Nonclinical BP measurement (NCBP) in a clinic setting can effectively mitigate 'white coat' bias.
• NCBP offers a more accurate alternative to traditional clinic BP (CBP) and home BP (HBP) monitoring when ambulatory BP monitoring (ABP) is not feasible.
• Implementing NCBP can improve the accuracy of hypertension diagnosis.