Data analysis
Continuous variables were expressed as median with interquartile range (IQR). The Q-Q plots and Shapiro–Wilk test showed evidence of non-normality, so non-parametric tests were used in all the analyses. The Mann–Whitney U test for non-normally distributed data was used to compare continuous variables (to compare changes from one audit to the next for both groups and to compare the two groups at each point). The test statistic, W, was the smaller of the absolute values of the positive ranks and negative ranks. This is the value we used to reject or fail to reject the null hypothesis of no difference in the median values. The difference between the medians over the three audits (first, second and third audits) were compared using Kruskal–Wallis test. Categorical variables were presented as frequency with corresponding percentages. Analysis was performed using R for windows version 4.1.1 and 