Effects of branched-chain amino acid granules on serum albumin level and prognosis are dependent on treatment adherence in patients with liver cirrhosis

Aim To test if the treatment adherence to branched-chain amino acid (BCAA) granules influences the serum albumin level and prognosis in prospective 2984 patients with decompensated liver cirrhosis who were prescribed BCAA granules containing 952mg of L-isoleucine, 1904mg of L-leucine and 1144mg of L-valine at 4.15g/sachet three times a day after meals. Methods The primary end-point was the time to the event defined as hospital admission due to progression of hepatic failure, and factors affecting this outcome were explored. Changes in serum albumin level were evaluated as the secondary end-point. Results Patients were divided into the good adherence group (those who reported to have taken nearly all prescribed doses) and the poor adherence group (those who reported to have taken approximately half or less doses), because such stratification was validated by treatment responses in plasma BCAA/tyrosine ratio. Factors related to the primary end-point were age, drug adherence during 6 months of study treatment, previous hepatic cancer, current clinical manifestations, previous clinical manifestations, baseline serum albumin level, platelet count and total bilirubin level. The cumulative event-free survival was significantly higher in the good adherence group. Increase in the serum albumin level was also greater in the good adherence group. Conclusion Higher BCAA treatment adherence better raised the serum albumin level, leading to improvement of event-free survival. These results indicate the importance of patient instruction for the adequate use of BCAA granules.