Learning Implementation of Guideline-based Decision Support System for Hypertension Treatment (LIGHT)

The LIGHT trial aims to assess the effectiveness of decision support system (DSS) for hypertension treatment in cluster clinics. At each stage, the main randomization will occur at the PHC center level. During the first 3 months (baseline period), the physicians at all sites will use an electronic data collection system to collect information about the individuals who attend the clinic. After site randomization, physicians at control sites will continue to deliver usual care, and physicians at intervention sites will receive training and support on the use of the DSS. And the DSS will recommend antihypertensive medications according to the assigned protocol. All individuals will be asked to attend the clinic at least once every 3 months.