> Smoking within 30 minutes of measurement can raise the systolic blood pressure to 20 mmHg
> a distended bladder can increase systolic and diastolic measurements by 10 to 15 mmHg.
> Sitting in a chair lacking back support can raise systolic blood pressure to 10 mmHg, and a similar increase is observed when both legs are crossed.
> Talking/listening during measurements can increase systolic and diastolic measurements by 10 mmHg.
The major exception is cuff placement over clothing which is noted to vary results by up to 50 mmHg but doing that is stupid anyway and makes you fail medical school.
https://www.ncbi.nlm.nih.gov/books/NBK482189/
> Smoking within 30 minutes of measurement can raise the systolic blood pressure to 20 mmHg
> a distended bladder can increase systolic and diastolic measurements by 10 to 15 mmHg.
> Sitting in a chair lacking back support can raise systolic blood pressure to 10 mmHg, and a similar increase is observed when both legs are crossed.
> Talking/listening during measurements can increase systolic and diastolic measurements by 10 mmHg.
The major exception is cuff placement over clothing which is noted to vary results by up to 50 mmHg but doing that is stupid anyway and makes you fail medical school.