Journal List > Korean J Nutr > v.45(1) > 1043936

Seo, Kim, and Heo: A Study on Nutritional Status during Dialysis in Patients Undergoing Continuous Ambulatory Peritoneal Dialysis


Patients undergoing peritoneal dialysis are at risk for protein-energy malnutrition because of nutrient losses during dialysis. This study determined the nutritional status of patients undergoing continuous ambulatory peritoneal dialysis (CAPD). Forty-four patients receiving CAPD were divided into two groups according to dialysis period. We investigated the nutritional status of the patients by measuring anthropometric and biochemical parameters, as well as food intake, self-appetite, dietary habits, a subjective global assessment, and a total nutritional status assessment. Group I subjects (7 males, 13 females) had received dialysis for < 2 years, whereas the group II subjects (18 males, 6 females) received dialysis for ≥ 2 years. Energy intake with added dextrose in the dialysate per kg of body weight was 30.3 ± 5.8 kcal in group I and 29.0 ± 8.1 kcal in group II. The average protein intake per kg of weight was 1.0 ± 0.3 g in group I and 1.0 ± 0.4 g in group II, which were less than the recommended protein intake for patients undergoing CAPD (1.2-1.5 g/kg). Mean serum albumin level was significantly lower in group II than that in group I (p < 0.05). A recent self-appetite score was significantly higher in group II than that in group I (p < 0.01). The dietary habits score was significantly lower in group II than that in group I (p < 0.05). The subjective global assessment was significantly higher in group I (85.0%) than that in group II (54.2%) under normal nutrition status (p < 0.05). The dialysis period was significantly and negatively correlated with the subjective global assessment (r = -0.502, p < 0.01) and the total nutritional status assessment (r = -0.575, p < 0.01). These results demonstrated that patients undergoing CAPD for ≥ 2 years had worse nutritional status than those who had been undergoing dialysis for < 2 years. Good nutritional status can predict the long-term survival of patients undergoing peritoneal dialysis. Additionally, the exact evaluation of nutritional status before 2 years will be important to maintain long-term dialysis therapy in patients undergoing CAPD.

Figures and Tables

Fig. 1
Self-appetite score of subjects. *: p < 0.05 by t-test.
Table 1
General characteristics of subjects

1) Mean ± SD 2) N (%) 3) Comorbidity: diabetes mellitus and hypertension

**: p < 0.01 by χ2-test or t-test

Table 2
Anthropometric measurement of subjects

1) Mean ± SD 2) N (%) 3) Obesity: > 25, Over weight: > 23, Normal weight: 18.5-22.9, Under weight: < 18.5

BMI: Body Mass Index, PIBW: Percent Ideal Body Weight, TBW: Total Body Water, LBM: Lean Body Mass, TSF: Triceps Skin Fold thickness, BSF: Biceps Skin Fold thickness, MAC: Mid-Arm Circumference, MAMC: Mid-Arm Muscle Circumference

*: p < 0.05, **: p < 0.01 by χ2-test or t-test

Table 3
Daily mean energy and nutrient intakes of subjects

1) Mean ± SD 2) Protein ratio: Animal protein is more than 60% of total protein

No significant difference between the two groups by χ2-test or t-test

IBW: Ideal Body Weight

Table 4
Blood biochemical parameters of subjects

1) Mean ± SD

BUN: Blood urea nitrogen

*: p < 0.05 by t-test

Table 5
Dietary habits of subjects

1) Mean ± SD

The question of 6 and 10 are back-calculated

*: p < 0.05, **: p < 0.01 by t-test

Table 6
Subjective global assessment of subjects

1) Mean ± SD

*: p < 0.05 by t-test or χ2-test

Table 7
Proportion of subjects met the nutritional standards

1) N(%)

BMI: Body Mass Index, LBM: Lean Body Mass, TSF: Triceps Skin Fold thickness, MAMC: Mid-Arm Muscle Circumference

*: p < 0.05, **: p < 0.01 by χ2-test

Table 8
Pearson's correlation coefficients between nutritional status variables and dialysis duration of subjects

TSF: Triceps Skin Fold thickness, BSF: Biceps Skin Fold thickness, SGA : Subjective Global Assessments

**: p < 0.01


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