Objective To determine the effect of home blood pressure\ud monitoring on blood pressure levels and proportion of people\ud with essential hypertension achieving targets.\ud Design Meta-analysis of 18 randomised controlled trials.\ud Participants 1359 people with essential hypertension allocated\ud to home blood pressure monitoring and 1355 allocated to the\ud "control" group seen in the healthcare system for 2-36 months.\ud Main outcome measures Differences in systolic (13 studies),\ud diastolic (16 studies), or mean (3 studies) blood pressures, and\ud proportion of patients achieving targets (6 studies), between\ud intervention and control groups.\ud Results Systolic blood pressure was lower in people with\ud hypertension who had home blood pressure monitoring than\ud in those who had standard blood pressure monitoring in the\ud healthcare system (standardised mean difference 4.2 (95%\ud confidence interval 1.5 to 6.9) mm Hg), diastolic blood pressure\ud was lower by 2.4 (1.2 to 3.5) mm Hg, and mean blood pressure\ud was lower by 4.4 (2.0 to 6.8) mm Hg. The relative risk of blood\ud pressure above predetermined targets was lower in people with\ud home blood pressure monitoring (risk ratio 0.90, 0.80 to 1.00).\ud When publication bias was allowed for, the differences were\ud attenuated: 2.2 ( − 0.9 to 5.3) mm Hg for systolic blood pressure\ud and 1.9 (0.6 to 3.2) mm Hg for diastolic blood pressure.\ud Conclusions Blood pressure control in people with\ud hypertension (assessed in the clinic) and the proportion\ud achieving targets are increased when home blood pressure\ud monitoring is used rather than standard blood pressure\ud monitoring in the healthcare system. The reasons for this are\ud not clear. The difference in blood pressure control between the\ud two methods is small but likely to contribute to an important\ud reduction in vascular complications in the hypertensive\ud population
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