Research Showcase Abstracts

Explore abstracts from CFDR’s annual research showcase at the DC Conference.

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Year
2022
Category
Research
Language
English
Names, Organizational Affiliations, and Locations of all Authors (2022 and Later)
D. Ghidanac1-3, M. Erlich1-3, Mejia. S. Blanco1,2, T.A. Khan1,2,
D. Jenkins1,2,4-6, E. Comelli1, C.W.C. Kendall1,2,7, J.L. Sievenpiper1,2,4-6;
1
Department of Nutritional Sciences, Temerty Faculty of Medicine, University of Toronto,
2
Toronto, Ontario, Canada, Toronto 3D Knowledge Synthesis and Clinical Trials Unit,
Clinical Nutrition and Risk Factor Modification Centre, St. Michael’s Hospital, Toronto,
3 4
Ontario, Canada, College of Dietitians of Ontario, Ontario, Canada, Division of
Endocrinology and Metabolism, Department of Medicine, St. Michael’s Hospital, Toronto,
5
Ontario, Canada, Department of Medicine, Temerty Faculty of Medicine, University of
6
Toronto, Toronto, Ontario, Canada, Li Ka Shing Knowledge Institute, St. Michael’s
7
Hospital, Toronto, Ontario, Canada College of Pharmacy and Nutrition, University of
Saskatchewan, Saskatoon, Saskatchewan, Canada
Title
The Effect of Substituting Soy Milk for Cow’s Milk Consumption on Blood Pressure: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Introduction/Purpose
Cow’s milk alone and as a key feature of the Dietary Approaches to Stop Hypertension (DASH) dietary pattern reduces blood pressure (BP) in normotensive and hypertensive subjects. National dietary guidelines are shifting to advising a plant-based diet and plant-based milks are growing in popularity. Research is needed to determine if soy milk is a suitable substitute for cow’s milk for BP reduction in adults.
Objective(s)/Process or Summary of Content
We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) to assess the effect of soy milk in substitution for cow's milk consumption on systolic and diastolic BP.
Method(s)/Systemic Approach Used
We searched MEDLINE, EMBASE and The Cochrane Central Register of Controlled Trials databases (through April 2022). We included RCTs of >3 weeks that assessed the impact of soy milk vs. cow's milk on BP in adults. Two independent reviewers extracted data and assessed risk of bias. A meta-analysis was performed using fixed effects models with data expressed as mean (MD) differences with 95% confidence intervals (95% CI). GRADE assessed the certainty of evidence.
Results/Conclusions
Out of the 1137 studies identified, 4 met eligibility criteria in 116 participants with hypertension (n=40) and without (n=76). Of the 76 without hypertension, 29 had diabetes. Doses of soy and cow’s milk were 240 mL per day, except for 1 study that provided 500 mL twice daily. Soy milk reduced SBP by – 8.77mmHg [–11.06, -6.48mmHg] and DBP by –6.11mmHg [–8.18, –4.04mmHg] compared to cow’s milk. Certainty of evidence was low for both SBP and DBP owing to downgrades for inconsistency and imprecision.
Conclusions(s)/Recommendations
Substitution of soy milk for cow’s milk has a moderate decreasing effect on SBP and DBP in adults. Larger and higher-quality trials are needed to improve our estimates.
Significance to Dietetics
These findings suggest that the substitution of soy milk for cow’s milk may lead to a reduction in BP, a major risk factor for cardiovascular disease.
Funded by
Canadian Institutes of Health Research (CIHR), Government of Canada, Diabetes
Canada

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