OXTR and X-linked cone dysfunction syndrome with myopia: Post hoc subgroup analyses showed that OXTR DNA methylation was not significantly different between females of the BED+ group (10.16% ± 0.38%) and females of the BED− group (9.76% ± 0.44%; U = 4405.0; p = 0.243; Cohen’s d = 3.91; Fig. 2a), but males of the BED+ group displayed a significantly lower OXTR DNA methylation (7.99% ± 0.5%) than males of the BED− group (10.3% ± 0.72%; U = 141.0; p = 0.022; Cohen’s d = 3.06; Fig. 2b).