Patients' blood pressure readings are notably higher when they're taken by a doctor than by a nurse, a new study finds.

This link between doctors and higher blood pressure readings is known as the "white coat effect," and is believed to be the result of patients being more nervous when examined by a physician, reports Webmd.com.

This effect has been noted in a number of previous studies, but this new paper is the first to confirm it, according to the study authors.

The investigators analyzed data from more than 1,000 people who had blood pressure readings taken by both doctors and nurses during the same visit. The readings taken by doctors were significantly higher than those taken by nurses, the study authors found.

The findings, published in the current issue of the British Journal of General Practice, should lead to changes in the way blood pressure readings are taken, according to lead author Dr. Christopher Clark, of the University of Exeter Medical School, in England.

"Doctors should continue to measure blood pressure as part of the assessment of an ill patient or a routine check-up, but not where clinical decisions on blood pressure treatment depend on the outcome," Clark said in a university news release.