Statistical analysis
The numerical data were presented as mean and standard deviation (SD) or median and interquartile range (IQR) for continuous data depending on their normality. For categorical data, frequency and percentage were used. Primarily, the normality of data distribution was evaluated by the box plot, graph and test of normality for both groups. To compare GRV between the two groups, the Mann–Whitney U test was performed. The Wilcoxon signed-rank test was used to compare participants’ well-being scores before and after administration of the drink in each group. The Mann–Whitney U test was conducted to compare patient’s well-being score between group A and B before and after administration of the drink. Data analyses were performed using IBM SPSS Statistics for Windows, Version 27.0 (IBM Corp., Armonk, NY, USA). The limit of significance was set at 0.05.