Maintenance of blood pressure treatment and control after discontinuation of work site follow-up.

Participants in a 3-year study of hypertension control at four work sites were rescreened 4 years after discontinuation of the study protocols. At the end of the 3-year study period, employees at the study sites that provided routine follow-up monitoring had shown significantly better levels of blood pressure control than at initial screening and significantly better levels than employees at the site that did not provide follow-up monitoring. But 4 years after discontinuation of the follow-up services this was no longer true. The level of blood pressure control at the experimental sites was no better than at the control site, and the level of control at all study sites was no better than would have been predicted for a population that had aged by 7 years. Some 17.6% of the participants were found to be in remission (with normal blood pressure readings, not under treatment), but the data suggested that they were at risk of future blood pressure elevations, warranting continued monitoring. The major predictor of continuation in treatment was frequency of blood pressure monitoring, but frequency of monitoring was not associated with maintenance of good control. It is concluded that follow-up monitoring programs at the work site should be treated as permanent services, not short-term programs.