PGS distribution of patients with prostate hyperplasia ( n = patient number) and the relationship between PGS percentiles and patient prevalence. In C and D , the box represents the interquartile range (IQR), which spans from the 25th percentile (Q1) to the 75th percentile (Q3) of the data. The bottom and top edges of the box represent the smallest observation and the largest observation excluding outliers. The line inside the box represents the median (50th percentile) of the data. Observations outside this range are considered outliers and are plotted individually.