Comparing methods of measuring treatment intensification in hypertension care.

Rose AJ, Berlowitz DR, Manze M, Orner MB, Kressin NR. Comparing methods of measuring treatment intensification in hypertension care. Circulation. Cardiovascular quality and outcomes. 2009 Jul 1; 2(4):385-91.

Related HSR&D Project(s)

• CDA 08-017 – Quality of Oral Anticoagulation Care in the VHA
• RCS 02-066 – Research Career Scientist Award

Dimensions for VA is a web-based tool available to VA staff that enables detailed searches of published research and research projects.

If you have VA-Intranet access, click here for more information vaww.hsrd.research.va.gov/dimensions/

VA staff not currently on the VA network can access Dimensions by registering for an account using their VA email address.    Search Dimensions for VA for this citation
* Don't have VA-internal network access or a VA email address? Try searching the free-to-the-public version of Dimensions

Search for Abstract from PubMed

---

Abstract:

BACKGROUND: Greater treatment intensification (TI) improves hypertension control. However, we do not know the ideal way to measure TI for research and quality improvement efforts. We compared the ability of different TI measures to predict blood pressure (BP) control. METHODS AND RESULTS: We enrolled 819 hypertensive outpatients from an urban academic hospital. Each patient was assigned 3 scores to characterize TI. The any/none score divides patients into those who had any therapy increases during the study versus none. The norm-based method models the chance of a medication increase at each visit, then scores each patient based on whether they received more or fewer medication increases than predicted. The standard-based method is similar to the norm-based method but expects a medication increase whenever the blood pressure is uncontrolled. We compared the ability of these scores to predict the final systolic blood pressure (SBP). The any/none score showed a paradoxical result: any therapy increase was associated with SBP 4.6 mm Hg higher than no increase (P < 0.001). The norm-based method score did not predict SBP in a linear fashion (P = 0.18); further investigation revealed a U-shaped relationship between the norm-based method score and SBP. However, the standard-based method score was a strong linear predictor of SBP (2.1 mm Hg lower for each additional therapy increase per 10 visits, P < 0.001). Similarly, the standard-based method predicted dichotomized blood pressure control, as measured by SBP < 140 mm Hg (odds ratio, 1.30; P < 0.001). CONCLUSIONS: Our results suggest that standard-based method is the preferred measure of treatment intensity for hypertension care.