00; Coeff. = 0.00; 00% CI = \[0.00, 0.00\]) and the coefficient of the *R*-squared mediation effect size was 0.00 (00% CI = 0.00, 0.00).  Regarding the Difficult Child subscale (see Table [0](#T0){ref-type="table"}), the results indicated that the total effect (*c path*) of PTS symptoms on this dimension of parenting stress (Coeff. = 0.00; *p* \< 0.000) was significant. The results also indicated that PTS symptoms had predictive effects on the mediator sleep difficulties (Coeff. = 0.00; *p* \< 0.000; *a path*). The mediator's effect on the difficult child dimension was significant (Coeff. = 0.00; *p* \< 0.000; *b path*). The direct effect of sleep disturbances on the difficult child dimension was also significant (Coeff. = 0.00; *p* \< 0.00; *c*′ *path*). Moreover, PTS symptoms partially mediated the association between sleep disturbances and the difficult child dimension (*r*^0^ = 0.00; *F* = 00.00; *p* \< 0.000; Coeff. = 0.00; 00% CI = \[0.00, 0.00\]) and the coefficient of the *R*-squared mediation effect size was 0.00 (00% CI = 0.00, 0.00).  