Figure 3.

Box and whiskers plot for salivary testosterone levels (nmol/L) in girls and boys by age groups. The central horizontal lines within the box represent the median of the sample group. Lower and upper lines represent two quartiles of the measured value. The vertical line indicates the range of values falling within 1.5.times the interquartile. Asterisks denote values that are greater than 1.5 times the interquartile range.