Premenstrual dysphoric disorder and childhood maltreatment, adulthood stressful life events and depression among Lebanese university students: a structural equation modeling approach

Background: Premenstrual Syndrome (PMS) is a cyclic sequence of physical and behavioral symptoms that arise in the second half of the menstrual cycle. The extreme type of PMS is Premenstrual Dysphoric Disorder (PMDD). The current study aims at examining 1) the effects of childhood maltreatment and current life's stressful events on PMDD, and 2) the mediating role of depression in these associations among Lebanese university female students. Methods: This cross-sectional study was conducted between February and March 2021 during the COVID-19 pandemic. Lebanese students were recruited using a snowball technique from all national universities in Lebanon via an auto-administrated online survey. Structural equation modeling was performed to examine the structural relationship between childhood maltreatment and life's stressful events, depression and PMDD. Results: Higher life's stressful events (Beta = 0.18; p < 0.001), physical (Beta = 0.19; p < 0.001), sexual (Beta = 0.18; p < 0.001) and psychological (Beta = 0.33; p < 0.001) abuse were significantly associated with higher depression. Moreover, higher sexual (Beta = 0.11; p = 0.021) and psychological (Beta = 0.11; p = 0.040) abuse and higher depression (Beta = 0.37; p < 0.001) were significantly associated with higher PMDD. The indirect relationships between psychological abuse/sexual abuse, depression and PMDD showed that depression mediated the association between both psychological (Beta = 0.22; p = 0.001) and sexual (Beta = 0.38; p = 0.004) abuse and PMDD. Conclusion: This work presents a unique analysis using the structural equation model that enlightens the effect of childhood maltreatment, particularly sexual and psychological abuse on PMMD symptoms, with depression playing the role of a mediating factor. It would be interesting to test, in future studies, whether there are other mediating factors besides depression that could be indirect indicators of PMDD.