• Marc G Jaffe, Grace A Lee, Joseph D Young, Stephen Sidney, and Alan S Go.
• Department of Endocrinology, Kaiser Permanente South San Francisco Medical Center, South San Francisco, California 94080, USA. marc.jaffe@kp.org
• JAMA. 2013 Aug 21; 310 (7): 699705699-705.

ImportanceHypertension control for large populations remains a major challenge.ObjectiveTo describe a large-scale hypertension program in Northern California and to compare rates of hypertension control in that program with statewide and national estimates.Design, Setting, And PatientsThe Kaiser Permanente Northern California (KPNC) hypertension program included a multifaceted approach to blood pressure control. Patients identified as having hypertension within an integrated health care delivery system in Northern California from 2001-2009 were included. The comparison group comprised insured patients in California between 2006-2009 who were included in the Healthcare Effectiveness Data and Information Set (HEDIS) commercial measurement by California health insurance plans participating in the National Committee for Quality Assurance (NCQA) quality measure reporting process. A secondary comparison group was included to obtain the reported national mean NCQA HEDIS commercial rates of hypertension control between 2001-2009 from health plans that participated in the NCQA HEDIS quality measure reporting process.Main Outcomes And MeasuresHypertension control as defined by NCQA HEDIS.ResultsThe KPNC hypertension registry included 349,937 patients when established in 2001 and increased to 652,763 by 2009. The NCQA HEDIS commercial measurement for hypertension control within KPNC increased from 43.6% (95% CI, 39.4%-48.6%) to 80.4% (95% CI, 75.6%-84.4%) during the study period (P < .001 for trend). In contrast, the national mean NCQA HEDIS commercial measurement increased from 55.4% to 64.1%. California mean NCQA HEDIS commercial rates of hypertension were similar to those reported nationally from 2006-2009 (63.4% to 69.4%).Conclusions And RelevanceAmong adults diagnosed with hypertension, implementation of a large-scale hypertension program was associated with a significant increase in hypertension control compared with state and national control rates. Key elements of the program included a comprehensive hypertension registry, development and sharing of performance metrics, evidence-based guidelines, medical assistant visits for blood pressure measurement, and single-pill combination pharmacotherapy.

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