Studies show, and my patients confirm to me, that most doctors don't do this, yielding BP readings that are misleadingly higher. If your SBP is over-read this way, you are at greater risk of over-treatment and harm than were the study patients. The risk of harm may be higher in the real world than in the study.
Almost everyone with high blood pressure or prehypertension should have a home blood pressure monitor. Home monitoring can help you keep tabs on your blood pressure in a comfortable setting. Plus, if you're taking medication it will make certain it's working, and alert you to a health problem if it arises.