highly significantP < 0.002
A highly significant effect of time of year (month) was observed in the total daily secretion of melatonin (P < 0.002); similarly, the 24-h profile was affected by month (P < 0.02).
A highly significant effect of time of year (month) was observed in the total daily secretion of melatonin (P < 0.002); similarly, the 24-h profile was affected by month (P < 0.02).
Cosinor modelling showed a significant change in the amplitude for the dopamine : melatonin (P < 0.02) and an almost significant change in serotonin : melatonin (P = 0.059).