(a) Serial mediation model 1 for SCD. Note. Serial mediation analyses were performed with 1000 bias-corrected bootstrapped samples. Unstandardized regression coefficients of self-reported SCD as outcome were out of brackets and coefficients for other-reported SCD as outcome were in brackets. Model tests the mediation effect of three pathways: (a) sleep quality ⟶ anxiety/depression ⟶ SCD; (b) sleep quality ⟶ worries ⟶ SCD; and (c) sleep quality ⟶ anxiety/depression ⟶ worries ⟶ SCD. Numbers associated with a, b, c, and d are unstandardized regression coefficients. The models are controlled for age, gender, education, income, and marital status. , , n.s. = not statistically significant. (b) Serial mediation model 2 for SCD. Note. Serial mediation analyses were performed with 1000 bias-corrected bootstrapped samples. Unstandardized regression coefficients of self-reported SCD as outcome were out of brackets and coefficients for other-reported SCD as outcome were in brackets. Model tests the mediation effect of three pathways: (a) sleep quality ⟶ anxiety/depression ⟶ SCD; (b) sleep quality ⟶ worries ⟶ SCD; and (c) sleep quality ⟶ worries ⟶ anxiety/depression ⟶ SCD. Numbers associated with a b, c and d are unstandardized regression coefficients. The models are controlled for age, gender, education, income, and marital status. , , n.s = not statistically significant.