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Research Fellow, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
Associate Professor, Leslie Dan Faculty of Pharmacy, University of Toronto
Faculdade de Ciências Médicas, Universidade de Campinas, Campinas, Brazil
Associate Professor, Leslie Dan Faculty of Pharmacy, University of Toronto
Reprints: Dr. Einarson, Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College St., Toronto, ON M5S 3M2 Canada, fax 416/978-8511, t.einarson{at}utoronto.ca
BACKGROUND: Hypertension is a major health concern worldwide due to its deleterious impact. Few studies have quantitatively assessed pharmacists' interventions in hypertensive patients.
OBJECTIVES: To identify and quantify outcomes sensitive to pharmacists' interventions.
METHODS: International Pharmaceutical Abstracts, MEDLINE, Cochrane Central, and EMBASE were searched from inception through December 2006. Two independent reviewers identified articles; results were compared and resolved through consensus. Data extracted included intervention type, patient numbers, demographics, study characteristics, instruments used, data compared, and outcomes reported. A random effects meta-analysis was used to combine data. Study quality was assessed using the Downs-Black scale.
RESULTS: Of 203 potential articles identified, 98 were selected and their abstracts were read. Nine of these were reviewed full-text and 19 more were identified from references, resulting in a total of 28 articles. Research designs included 18 randomized controlled trials, 6 single-arm clinical trials, 3 nonrandomized comparative trials, and 1 database study. Average quality score was 66% ± 12% (fair). Medication management (82%) and hypertension education (68%) were the interventions most used. Thirty-nine study results (57% of all outcomes evaluated) were sensitive to pharmacists' interventions. Meta-analysis of 2246 patients in 13 studies found that pharmacists' interventions significantly reduced systolic blood pressure (10.7 ± 11.6 mm Hg; p = 0.002), while controls remained unchanged (3.2 ± 12.1 mm Hg; p = 0.361). Pharmacists' interventions further reduced systolic blood pressure (6.9 ± 12.1 mm Hg; p = 0.047) over controls. Nonsensitive results included further reduction in diastolic blood pressure (3.6 ± 3.7 mm Hg; p = 0.06), quality of life (1 of 8 significant), and adherence (5 of 13 significant).
CONCLUSIONS: Systolic blood pressure is sensitive to pharmacists' interventions. Other outcomes may also be sensitive; however, more high-quality studies are needed for a comprehensive quantitative assessment.
Key Words: hypertension, pharmaceutical care, pharmacist intervention
Published Online, October 9, 2007. www.theannals.com, DOI 10.1345/aph.1K311
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