Nutritional intervention not effective for preventing weight gain following kidney transplant
Intensive nutrition intervention programmes are not better than standard nutrition care in preventing weight gain in kidney transplant recipients 1 year after the operation, a recent study has found.
The single-blind randomized controlled trial included 36 adult kidney transplant recipients who were randomly assigned to receive the intensive intervention (n=18; mean age 49.2±14.6 years; 67 percent male) or standard nutrition care (n=18; mean age 48.3±13.9 years; 72 percent male). Weight at 6 months after the transplant was the primary outcome.
Mean body weight for the whole cohort increased from 78.0±13.7 kg at baseline to 79.6±13.0 kg at 6 months and 81.6±12.6 kg at 12 months, reflecting a significant 4.6-percent increase.
Analysis of covariance showed that mean weight at 6 months was statistically similar between both groups (intervention: 77±12.4 kg; control: 82.2±13.4 kg; adjusted mean difference, 0.4 kg; 95 percent CI, –2.2 to 3.0 kg; p=0.7).
In terms of secondary outcomes, no significant group-by-time interaction was observed for body mass index (p=0.354), waist circumference (p=0.484), hip circumference (p=0.608), total body fat (p=0.697), total body protein (p=0.861), total body potassium (p=0.175), resting energy expenditure (p=0.260) and other measures of anthropometry and body composition.
Both intervention groups likewise yielded similar outcomes in terms of grip strength (p=0.986), gait speed (p=0.304), sit-to-stand-to-sit test scores (p=0.167) and weekly physical activity (p=0.602), indicating comparable efficacies in terms of physical function.
In comparison, control participants showed significantly better general-health quality of life between 6 and 12 months (p=0.003), while total energy intake significantly decreased from baseline to 6 months in the intervention group (p=0.02).