Assessment of Students' Perception of the Nutrition Curriculum in a Canadian Undergraduate Medical Education Program.

BACKGROUND: Nutrition plays an important role in diseases, and physicians need to be proficient in providing nutrition counselling to patients. There is limited information regarding nutrition education in Canadian medical schools. OBJECTIVE: The objective of this study was to investigate students' perspectives about nutrition training provided in the undergraduate medical education program at Dalhousie University. METHODS: All medical students in their second, third, and fourth years of training at Dalhousie University were surveyed online with a 23-item questionnaire that included 10 nutrition competencies. RESULTS: Of 342 students, 89 (26%) completed the survey. Using a five-point Likert scale, ranging from one, indicating 'very dissatisfied/strongly disagree' to five, indicating 'very satisfied/strongly agree,' the mean overall satisfaction with nutrition curriculum was 2.9 ± 0.81. Perceived competency in nutrition assessment had the highest mean satisfaction rating (3.98 ± 0.89). There was more variance on perceived competency, with other aspects of training including basic nutrition principles (3.51 ± 0.92), disease prevention (3.14 ± 1.12), disease management (3.48 ± 1.00), role of dietitians (2.97 ± 1.05), credible nutrition sources (3.14 ± 1.09), dietary assessment (2.82 ± 1.11), lifecycle nutrition (2.67 ± 1.09), food security (2.4 ± 0.95) and malnutrition (2.74 ± 0.93). Med-4 students agreed significantly more than Med-2 students regarding confidence about their understanding of the role of dietitians. Students recommended a longitudinal nutrition program, inclusion of dietitians as educators, and provision of evidence-based resources in the curriculum. The majority (79%) agreed that more nutrition instruction is needed. Satisfaction with nutrition education has not improved since 2010, despite curricular changes. CONCLUSIONS: Medical students' satisfaction with nutrition education remains problematic. They want more nutrition training. Ongoing assessment and student feedback is important to make changes and improvements in the nutrition curriculum.

B-vitamin deficiency in hospitalized patients with heart failure.

The impact of heart failure and its treatment on specific nutrient requirements is unknown. Furthermore, depletion of water-soluble B vitamins that play key roles in the production of cellular energy in patients with heart failure can contribute to depletion of energy reserves observed in the failing heart. A cross-sectional study recently reported that approximately one third of hospitalized patients with heart failure had tissue levels suggestive of thiamin deficiency (vitamin B-1). Riboflavin (vitamin B-2) and pyridoxine (vitamin B-6) are similar to thiamin in that they are water-soluble, subject to renal excretion, have limited tissue storage, and are dependent on intake. Therefore, it was hypothesized that the status of these B vitamins may also be adversely affected by heart failure. As a result, the prevalence of patients at risk of vitamin B-2 (erythrocyte glutathione reductase activity coefficient > or = 1.2) and B-6 deficiency (plasma B-6 < or = 20 nmol/L) was determined in a cross-section of 100 patients hospitalized with heart failure between April 2001 and June 2002 as well as in a group of volunteers without heart failure. Twenty-seven percent of patients with heart failure had biochemical evidence of vitamin B-2 deficiency, while 38% had evidence of B-6 deficiency. These prevalence rates were significantly higher than those observed in the volunteers without heart failure (2% and 19%, respectively; P < or = 0.02). Use of common B-vitamin-containing supplements by patients with heart failure did not significantly reduce deficiency rates in comparison with those who did not use supplements (B-2 P=0.38 or B-6 P=0.18)). Finally, while 80% of patients with heart failure took diuretics, neither the dose nor the duration of furosemide use was related to the presence of either B-2 or B-6 deficiency. Given the physiologic importance of these vitamins, further investigations aimed at determining the effect of heart failure on specific nutrient requirements as well as the safety and efficacy of B-vitamin supplementation are warranted.

The prevalence of thiamin deficiency in hospitalized patients with congestive heart failure.

OBJECTIVES: The purpose of this study was to determine the prevalence of thiamin deficiency (TD) in a cross section of hospitalized congestive heart failure (CHF) patients and to investigate factors that contribute to its development. BACKGROUND: Thiamin deficiency manifests as symptoms of CHF and, therefore, may worsen existing heart failure. Congestive heart failure patients may be at increased risk for TD as a result of diuretic-induced urine thiamin excretion, disease severity, malnutrition, and advanced age. METHODS: Erythrocyte thiamin pyrophosphate concentrations, using high-performance liquid chromatography, were measured in 100 CHF patients and compared to 50 control subjects. Variables including diuretics (type and dose), left ventricle dysfunction, New York Heart Association functional classification, creatinine clearance, thiamin intake (diet and supplements), malnutrition, appetite ratings, and age were related to TD using univariate statistics and multiple logistic regression analysis. RESULTS: Thiamin deficiency was more prevalent in CHF patients (33%) compared to control subjects (12%) (p = 0.007). Thiamin deficiency was related to urine thiamin loss (p = 0.03), non-use of thiamin-containing supplements (p = 0.06), and preserved renal function (p = 0.05). Increased urinary thiamin loss (mug/g creatinine) was found to be the only significant positive predictor of thiamin status on multiple logistic regression analysis (p = 0.03). CONCLUSIONS: One-third of hospitalized CHF patients were TD. In contrast to previous studies, increased urinary losses of thiamin were predictive of improved thiamin status. Thiamin supplementation may be protective against TD in the clinical setting. Future studies are warranted to determine if thiamin supplementation improves thiamin status and disease severity in CHF patients.