Fig. 4

Directed acyclic graph illustrating simplified relationships of superficial and deep dyspareunia with endometriosis

Abbreviations: C, confounding factors considered in the study (age, body mass index, ethnicity, age of menarche, parity, education level, employment status, marital status, annual income, and hormone use in the last three months)

Notes: Solid arrows represent direct associations between variables. The dashed arrow represents a potential relationship