Limitations of provider interventions in hypertension quality assurance.

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Abstract
In an institutional quality assurance program in hypertension, performance of tests, control of blood pressure, and follow-up were monitored through a computer program that was developed to audit records in an automated record system. Two types of feedback previously shown to be effective were provided quarterly for a period of one year to experimental providers. For all hypertensives considered together, there were no differences between scores of Experimental and Control providers based on percentage of patients meeting pre-set criteria in testing--87% vs 87%--, blood pressure control--58% vs 59%--, or follow-up--79% vs 77%. Only small but significant differences occurred in the subgroup of moderate to severe hypertensives. There appear to be limitations to what can be accomplished through hypertension quality assurance interventions directed at providers of care in this institutional setting. Interventions designed to deal directly with patients whose blood pressures are uncontrolled may be more effective.