Poster Topical Area: Aging and Chronic Disease
Poster Board Number: 91
In a previous study we noted that stable, long-term kidney transplant recipients (KTRs) in our inner-City clinic had low intake of phosphorous, protein and calories, but it was unclear whether this reflected dietary habits of the local population or was related to habits acquired during CKD and dialysis, as many patients reported difficulty in "unlearning" the dialysis diet.
Patients were randomly chosen at the Transplant Clinic and a general medical clinic in the same area. They were interviewed by face-to-face technique. A previous study revealed equivalence between 3 day diet history and 24 hour recall so Macronutrient intake was measured by the latter technique and analyzed using USDA Supertracker.
There were 16 pts in the transplant group and 23 in the general medicine (GMED) group. Mean time since transplant was 11.4±0.11 yrs. The groups differed for age (50.5±0.3 yrs vs 65.4±2.3, p<0.05), but not for gender, marital status, insurance type (90% of pts were Medicaid primary) or BMI (28.5±1.5 vs 29.9±.1). All pts were Afro- American or Caribbean descent. All KTRs and 83% of the GENMED had a history of hypertension. Only 31% of GENMED and 50% of KTRs pts ate <2gm sodium. Lab values revealed no difference in Hgb, albumin, potassium, sodium or magnesium. Creat was higher in the KTR group (2.02±0.3 vs 1.25±0.08, p<0.05). KTRs ate fewer calories (1376.3±116.4 vs 2165.9±252.0, p<0.05), less potassium (1837.3±211.7 vs 3153.9±463.9, p<0.05), sodium (2256.1±337.8 vs 3432.6±463.4, p<0.05), phosphorous (920.1±17.8 vs 1432.8±169.7, p<0.05), and carbohydrates (161.8±13.8 vs 257.5±26.5, p<0.05), but not calcium, protein (gms) or fat (gms).
In our population, 1. KTRs ate significantly fewer calories although BMI was similar to GMED, suggesting that they require fewer calories to maintain their weight. 2. Protein and fat intake was similar, with the difference accounted for by lower carbohydrate intake. 3. KTRs ate less sodium, potassium and phosphorous, all nutrients that are restricted on the CKD/dialysis diet. Further research into factors that affect dietary choices in these populations may help to motivate pts to make healthy food choices.
Brooklyn, New York