A Cross-Sectional Study of Myopia and Morning Melatonin Status in Northern Irish Adolescent Children

Figure 1

Melatonin concentration was not associated with (a) axial length or (b) SER in adolescent participants. Concentration of morning salivary melatonin was significantly related to (a) axial length and (b) SER in adult participants but not in adolescent participants of the present study. In both studies, morning saliva samples were collected at home, upon waking. One adolescent participant’s melatonin level (16.6 pg/ml) was identified as an outlier and is not included in this figure. Adult data were provided by Flanagan et al. [2] ρ = Spearman’s correlation coefficient. Indicates significance at  < 0.05.

(a)

(b)