GSS cIRcle Open Scholar Award (UBCV Non-Thesis Graduate Work)

Integration of First-line Lifestyle Modification and First-line Hypertension Drug Research: Analysis.. Wilson, Dan E. 2012

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Purpose Results Integration of First-line Lifestyle Modification and First-line Hypertension Drug Research: Analysis of Source Articles in a Leading Cochrane Report Dan E. Wilson, Tashina Van Vlack, Jason Shane, Brendin Schievink, Eric Doak Supervisor: Elizabeth Dean, PhD Department of Physical Therapy, Faculty of Medicine, University of British Columbia, B.C., Canada Recommendations 1) Encourage lifestyle modification strategies to be incorporated into the research design for pharmacological studies on HTN 2) Generate more evidence to support the effects of lifestyle modification and their interaction with pharmacokinetics of anti HTN drugs 3) Further investigation into current research methods used for RCCT in antihypertension drug studies 4) Future RCCTs examining the effect of medication in the management of hypertension should include: • incorporation of lifestyle modification into the study design that is adequately monitored and recorded by investigators •stratification of study results with attention to impact of lifestyle modification on outcomes • To establish how lifestyle modification, which is considered first-line in hypertension prevention and management, is integrated into anti-hypertension drug trials. • Persistent hypertension (HTN) is a major risk factor for cardiovascular and cerebrovascular mortality • HTN is managed through both medication and lifestyle modification (Table 1) • The degree to which lifestyle factors for managing HTN are integrated into studies of first-line drug management for hypertension is generally unknown. Methods  • Analysis of source Articles in a leading Cochrane Review that was designed to inform first-line medical treatment of HTN. • In total 34 source articles in total were reviewed. • Each article was assessed for any mention of lifestyle intervention including smoking cessation, diet, weight loss, physical activity and exercise, stress reduction, and moderate alcohol consumption.  Results (continued) Background Table 1  Canadian Hypertension Education Program 2012 Discussion • 76% of the included large drug trials in the Cochrane review were over two decades old. (26 of 34) • 54% of large clinical drug trials made no mention in any of their publications regarding lifestyle modifications. (13 of 24) • Several drug trial publications allowed for inconsistent recommendations for lifestyle modification based on individual doctor and investigator judgment. • All except the UKPDS 39 drug trial poorly described the lifestyle modification recommendations in their methodology. • In a post-hoc analysis the MRC-TMH drug trial found that there was a different response to the drop between smokers and non-smokers. Table 2 Selected Results from the Analysis of Source Articles that Included Mention of Lifestyle Modification Demonstrating Major Themes Table 3 Publications Including Any Mention of Lifestyle Modification Results Conclusion • Our findings discovered inadequate control and/or mention of lifestyle throughout our source articles included within the 2009 Cochrane Review. • Current research provides unequivocal data to support the use of lifestyle modification strategies to promote a decrease in blood pressure for individuals with hypertension. • The inclusion of lifestyle modification strategies in the research designs for hypertension drug trials could enhance current research. • A shift in research paradigm for clinical drug trials could provide evidence for the invasive/non-invasive practitioner that corresponds to the increasing need for the practical application of research to clinical practice. • Common themes were identified in analyzing the 34 source articles. • Table 2 provides 5 example results that demonstrate the major discussion themes from all source articles that included any mention of lifestyle modification.


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