Purpose: Serum albumin (Alb) levels are an indispensable marker for evaluating clinical nutrition status. The improved BCP (Bromcresol purple) method can measure the Alb levels more accurately than the conventional BCG (Bromcresol green) method. Therefore, this study aimed at investigating the influence of the two methods on clinical nutrition indices (CNI).
Materials and methods: A total of 7,891 blood samples from inpatients and outpatients were analyzed for serum Alb levels using both the BCG method and the improved BCP method simultaneously between Feb. 10 2009 and Mar. 31 2009. Based on the Alb levels from each method, Onodera's PNI (Prognostic Nutritional index) and COUNT (Controlling Nutritional status) values were calculated as nutrition index, and GPS (Glasgow Prognostic Score) and Miki's classification as cachexia evaluation.
Results: For Onodera's PNI value, the number of patients classified as nutritional deficiency was 7% higher by the improved BCP method than by the BCG method (P<0.001). For COUNT value, patients with moderate or higher nutritional deficiency was 5% more by the improved BCP (P<0.001). For GPS, the number of class 2 patients, highly suggestive of being cachexia was 5% more by the improved BCP (P<0.001). Moreover, for Miki's classification, patients with cachexia were 8% more by the improved BCP method (P<0.001).
Conclusions: CNI from the improved BCP method was able to identify more patients with moderate or severe nutrition deficiency precisely than that from the conventional BCG method. In the near future, further clinical examinations will be required to determine the new cut-off value for evaluating clinical nutrition status according to the improved BCP method.
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