Does ambulatory and home blood pressure measurement improve the prediction of death compared to office blood pressure in the general population?
While home and ambulatory BP increases are associated with a steeper increase in mortality risk compared to office BP, their overall predictive ability for death is similar, though combining measurement methods offers slight improvement.
In the PAMELA population, risk of death increased more with a given increase in home or ambulatory than in office BP. The overall ability to predict death, however, was not greater for home and ambulatory than for office BP, although it was somewhat increased by the combination of office and outside-of-office values. Systolic BP was almost invariably superior to diastolic BP, and night BP was superior to day BP.
Sega et al. (2005) studied this question.