A structural equation modelling of the direct and indirect factors associated with functional status over time as measured by WHODAS-32 items among postpartum women in Northwest Ethiopia

INTRODUCTION: Full functional status recovery which is a multidimensional concept, that includes personal care, infant and family care, social and occupational activities and adjusting to the role of motherhood may require several months to achieve. However, most study designs on postpartum maternal functional status were cross-sectional, providing limited insights into functional status patterns over time and the mediating relationships among variables associated with it during the postpartum period. OBJECTIVE: To investigate the patterns of functional status over time and the mediating relationships among variables associated with functional status after childbirth. METHODS: From October 2020 to March 2021, 775 women in Northwest Ethiopia participated in a community-based follow-up study that was linked to a health institution. Functional status was measured by the Amharic version of WHODAS 2.0 instrument. Structural equation modelling was used to determine the direct and indirect effects of predictor variables on individual domains of functional status as measured by WHODAS 2.0 instrument. RESULTS: Higher fear of childbirth score, anxiety and PTSD score had a direct deleterious effect (increased risk of functional disability) on the overall functional status and six domains of WHODAS 2.0 (cognition, mobility, self-care, getting along with people, household life activities and community participation) at the first, second and third follow up periods. Higher social support had a direct protective effect (decreased risk of functional disability) on all domains of WHODAS 2.0 and the overall functional status at the three follow up periods. Higher social support had also an indirect protective effect through fear of birth on the six domains of WHODAS 2.0 and the overall functional status throughout the follow up period. Higher PTSD symptom score had also an indirect deleterious effect (increased risk of functional disability) through fear of birth on the overall functional status and six domains of WHODAS 2.0 (higher disability) throughout the follow up period. Complications of delivery management had a direct deleterious effect (increased disability score) on the domains of getting along with people, household life activities, mobility, self-care and community participation and on the overall functional status disability score. CONCLUSION: Maternal functioning in the postpartum period is initially impaired, but improves over time. Despite improvement, maternal morbidities are correlated with worse functioning scores compared to women without these morbidities. Interventions should target on the mediating role of fear of child birth, life threatening event of health risk and PTSD with the deleterious effects of complications of delivery management, poor social support, vaginal mode of delivery, anxiety, poor physical and mental quality of life on functional status of postpartum women. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s13690-023-01055-w.