NR3C1 and post-traumatic stress disorder: The negative correlation between parenting stress and NR3C1 methylation was primarily driven by maternal IPV-PTSD (n = 20, r = -0.529, p = 0.017) and subthreshold (n = 7, r = -0.764, p = 0.046) groups, rather than by the HC (n = 17, r = 0.060, p = 0.820).