Dietary Counselling for Dyslipidemia in Primary Care: Results of a Randomized Trial

Publication: Canadian Journal of Dietetic Practice and Research
December 2002

Abstract

This study compared the effectiveness of physician advice versus dietitian advice for a fat-reduced diet, and of dietitian advice for a fat-reduced diet versus a soluble fibre-enhanced diet in patients with moderate dyslipidemia. A total of 111 men and women took part in this 26-week, three-group, randomized, clinical trial. The physician advice fat-reduced diet group (n = 38) and the dietitian advice fat-reduced diet group (n = 35) received dietary advice based on the American Heart Association (AHA) Step II guidelines. The dietitian advice soluble fibre-enhanced diet group (n = 38) consumed one-third cup per day of psylliumcontaining cereal and was advised to increase soluble fibre intake to over 10 grams a day. LDL-C, TC/HDL-C ratio and body weight reductions over six months were –5.3%, –4.6%, and –1.9%, respectively, regardless of whether a physician or a dietitian provided advice, or whether advice was focused on a fat-reduced diet or a soluble fibre-enhanced diet. Both dietitians and physicians can help moderately dyslipidemic patients make clinically meaningful changes in blood lipid levels. Soluble fibre enhancement of the usual diet leads to similar reductions in LDL-C and TC/HDL-C ratio compared to interventions focused on fat reduction.

Résumé

L’étude avait pour but de comparer l'efficacité des conseils du médecin et de la diététiste sur un régime à faible teneur en matières grasses, et l'efficacité des conseils de la diététiste sur un régime à faible teneur en matières grasses et sur un régime enrichi en fibres solubles chez des patients souffrant de dyslipidémie modérée. Au total, 111 hommes et femmes répartis aléatoirement en trois groupes ont participé à l'essai clinique de 26 semaines. Les patients conseillés par un médecin (n=38) ou une diététiste (n=35) sur un régime à faible teneur en matières grasses ont reçu des conseils basés sur la phase II de l'approche approuvée par l'American Heart Association. Le groupe conseillé par une diététiste sur un régime enrichi en fibres solubles (n=38) consommait un tiers de tasse par jour de céréales renfermant du psyllium et on leur recommandait de prendre plus de 10 grammes par jour de fibres solubles. Les diminutions de C-LDL, du ratio TC/C-HDL et du poids après six mois se chiffraient à –5,3%, –4,6% et –1,9% respectivement, que les conseils aient été donnés par le médecin ou la diététiste, axés sur un régime à faible teneur en matières grasses ou enrichi en fibres solubles. Diététistes et médecins peuvent aider modérément les patients dyslipidémiques à faire des changements cliniquement significatifs dans les niveaux de lipides sanguins. Accroître la quantité de fibres solubles ou réduire celle des matières grasses dans l'alimentation habituelle entraîne des diminutions semblables de C-LDL et du ratio TC/C-HDL.

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Information & Authors

Information

Published In

cover image Canadian Journal of Dietetic Practice and Research
Canadian Journal of Dietetic Practice and Research
Volume 63Number 4December 2002
Pages: 169 - 175

History

Version of record online: 12 February 2007

Authors

Affiliations

Robert Reid, PhD, MBA
Prevention and Rehabilitation Centre, University of Ottawa Heart Institute, Ottawa
George Fodor, MD, PhD
Prevention and Rehabilitation Centre, University of Ottawa Heart Institute, Ottawa
Kathleen Lydon-Hassen, DipSc
Prevention and Rehabilitation Centre, University of Ottawa Heart Institute, Ottawa
Monika Slovinec D'Angelo, MEd
Prevention and Rehabilitation Centre, University of Ottawa Heart Institute, Ottawa
Jennifer McCrea, BSc
Prevention and Rehabilitation Centre, University of Ottawa Heart Institute, Ottawa
Mary Bowlby, BSc, RD
Prevention and Rehabilitation Centre, University of Ottawa Heart Institute, Ottawa
Loretta Difrancesco, PhD, MBA, RD
Kellogg Canada Inc., Toronto

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