MIND-BODY THERAPIES FOR HYPERTENSION Systematic Review and Meta-Analysis Ather Ali, ND, MPH (1), David L. Katz, MD, MPH (1,2), Michael B. Bracken, PhD,

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MIND-BODY THERAPIES FOR HYPERTENSION Systematic Review and Meta-Analysis Ather Ali, ND, MPH (1), David L. Katz, MD, MPH (1,2), Michael B. Bracken, PhD, MPH (2). (1)Yale-Griffin Prevention Research Center (2) Department of Epidemiology and Public Health Yale University School of Medicine

Background - Hypertension Most common reason for physician office visits in the United States. Age-adjusted prevalence: 32% blacks; 23% whites (50 million in the US). Top attributable risk factor for death worldwide. 34% of hypertensives under control. Increasing evidence of psychosocial risk factors including time urgency/impatience hostility, work stress, chronic anger, SES, and depression.

CAM for HTN - Epidemiology 42% of the public has used CAM. –Out-of pocket expenses Mind-Body medicine is one of five major branches of CAM. –“Behavioral techniques are employed to augment the mind's capacity to affect bodily function and symptoms, utilizing varied modalities such as meditation, prayer, mental healing, and therapies that use creative outlets such as art, music, or dance.” 30 million users of relaxation techniques including meditation and yoga, and 10 million users of yoga therapies in ~3 million (8%) have tried MBT for HTN –Of these, 25% found MBT “very helpful.”.

Objectives Aims to assess the efficacy of the most prevalent MBT versus placebo or active control in the treatment of hypertension. Outcome measures are change in SBP and DBP (pre- and post-intervention period).

Operational Definitions Most prevalent MBTs (>3.5% of general population) are meditation, yoga, and guided imagery techniques. Yoga is “the joining of the lower human nature to the higher” Yoga techniques comprise a series of body positions and movements developed in order to help relax the body and calm the mind. It involves breath control, physical exercises, and meditation. Meditation: “intentional self-regulation of attention,” a systematic mental focus on particular aspects of inner or outer experience. It involves engaging in an activity that directs the mind to single point of focus, using breathing techniques, or imagery in order to feel a state of calmness. Guided imagery: Using the capacities of visualization and imagination, individuals evoke images, usually either sensory or affective. These images are typically visualized with the goal of evoking a psychophysiological state of relaxation or with some specific outcome in mind.

Inclusion Criteria Studies: RCTs (or quasi-randomized) comparing MBT alone or in combination with conventional treatment to conventional treatment alone or no intervention / waiting list control. Subjects: Hypertensive adult men and non-pregnant women Outcomes: SBP and DBP assessed at baseline and following intervention; Search strategy: Cochrane Complementary Medicine Field Registry, The Cochrane Central Register of Controlled Trials (CENTRAL; 2005), Medline (1966- present), EMBASE (1966-present), PsycInfo (1875- present), and CINAHL (1960-present). Keywords: hypertension, blood pressure, mind-body, meditation, yoga, imagery, and guided imagery (English)

Quality 1) Was method of allocation sequence adequate 2) Information re: dropouts/withdrawals 3) Were outcomes assessor blinded? (if possible) 4) Were co-interventions documented? 5) Were treatment and placebo groups balanced in terms of number of treatments received and time spent in therapy? A : High quality - all criteria met B: Moderate quality - one or more criteria only partially met C: Low quality - two or more criteria not met Review Manager used. Results of each intervention group were weighted by the sample size and reported as WMD I 2 [(Q – df)/Q x 100%] tests for heterogeneity. A random effects model is used for primary analysis.

Analysis – Mind-Body Therapies Systolic Diastolic WMD [5.06, 17.98]WMD 6.83 [1.71, 11.95]

WMD 5.72 [0.52, 10.91] Analysis – Meditation Systolic Diastolic WMD 1.66 [-3.87, 7.19]

WMD [7.75, 30.39] Analysis – Yoga Systolic Diastolic WMD [3.94, 22.32]

WMD 8.28 [0.08, 16.48] Analysis – High Quality Studies Only Systolic Diastolic WMD 4.91 [-2.44, 12.26]

Discussion In the most efficacious MBTs, absolute reductions in blood pressure are comparable to pharmacologic monotherapy in both effect size and temporality (ALLHAT). BP reductions to the degree found in yoga interventions are associated with reductions in vascular death rates as well as decreased overall cardiac risk (JNC 7/ Framingham).

Discussion Analysis of high quality studies demonstrated weaker BP reduction; DBP reduction was nonsignificant. Trial quality was generally moderate-low with high heterogeneity. –Duration and type of intervention differed widely, even within MBT category –Meditation trials were less heterogeneious but may suffer from higher bias Given statistically weak, though generally positive effects, without apparent adverse effects: –BP reductions compare favorably with what can be achieved using any of the most popular BP medications. –Additional research is needed to assess long-term effects on cardiac outcomes

National Center for Complementary and Alternative Medicine National Institutes of Health U.S. Department of Health and Human Services This work was supported by a grant from