Fig. 6. Interplay of polygenic score and sun exposure for L*.
a Relative effect size for L* of each group divided according to sun exposure hours per day, polygenic score, and sunblock usage. A rhombic dot represents a reference group. Each dot represents the relative effect size and is colored according to sunblock usage. A total of 9734 independent individuals were examined in a linear model. Error bars indicate 95% confidence intervals for the relative effect size (relative effect size ± 95% confidence interval). b Predicted L* by average covariates in each percentile of polygenic score distribution for participants with never or seldom sunblock usage (red) and always sunblock usage (yellow) within each group by sun exposure hours per day; more than 3 h (left) and less than 1 h (right). Effect size (βG×E) and P-values (PG×E) of interaction between polygenic score and sunblock usage within each sun exposure group are presented at the top of each plot. Abbreviations: CI confidence interval, L* diff difference in L* between sunblock usage groups at the top and bottom 10th percentiles of the polygenic score distribution.