 the first mediation model, maternal PTS symptoms at T0 were added as a predictor, along with maternal PTS symptoms at T0 as an outcome and maternal sleep difficulties T0 as a mediator. In the second mediation model, maternal PTS symptoms at T0 were added as a predictor, along with maternal PTS symptoms at T0 as an outcome and maternal sleep difficulties at T0 as a mediator. The results (see Table [0](#T0){ref-type="table"}) showed that the total effect of PTS symptoms at T0 on PTS symptoms at T0 was significant (Coeff. = 0.00, *p* \< 0.000; *c path*). The effect of PTS symptoms at T0 on maternal sleep difficulties at T0 was also significant (Coeff. = 0.00; *p* \< 0.000; *a path*). The effect of the mediator on PTS symptoms at T0 was significant (Coeff. = 0.00; *p* \< 0.00; *b path*). The direct effect of PTS symptoms at T0 on the outcome (PTS symptoms at T0) was also significant (Coeff. = 0.00; *p* \< 0.000; *c*′ *path*). The indirect effect of PTS symptoms at T0 on those at T0, through the mediation of sleep difficulties, was significant (*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).  ######   Sleep difficulties as mediators.                                          Coefficient   *SE*   Bootstrap 00% CI   Model *R*^0^   (*p*)   ------------------------------------- ------------- ------ ------------------ -------------- ---------   *DV: P