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Density plots showing the distribution of MSFsc, SJL and PSQI scores in (A) participants 20 years old or younger, and those of 21 years or older and (B) males and females. (C) Box plots showing the main effects of sex and age on MSFsc and SJL, and sex on PSQI, but no age group and sex interactions effects on MSFsc, SJL or PSQI.
