Figure 2.

Proportional distribution of low, moderate, and high salivary melatonin levels of the total sample (six groups) at intake. Salivary levels of melatonin: Dotted fill: <0.50pg/ml; striped fill: between 0.5–50pg/ml; complete fill: >50pg/ml; no fill: missing. Groups: Children ‐ Light cyan: boys taking melatonin at intake; dark cyan: girls taking melatonin at intake; light magenta: boys not taking melatonin at intake; dark magenta: girls not taking melatonin at intake; adults ‐ black: men not taking melatonin at intake and grey: women not taking melatonin at intake.