Analysis of the Predictive Factors for the Recurrence of Deep Infiltrating Endometriosis:A 2-Year Prospective Study

Objective:To investigate factors that may be associated with the recurrence of deep infiltrating endometriosis(DIE)and DIE-related symptoms.Methods:Starting in September 2014,women with a confirmed diagnosis of DIE based on surgical and histological findings were included in the prospective study with a 2-year follow-up in our hospital.A total of 84 consecutive patients were included,all of whom underwent laparoscopic surgery.The data were obtained from the medical records of the patients.Follow-up data,including presence of pain as assessed using the visual analog scale(VAS)score and ultrasonography/magnetic resonance imaging findings,were obtained at 3,6,9,12,and 24 months postoperatively.Variables,such as age,body mass index,severity and duration of symptoms,size and location of the lesion,and pre-and postoperative medical treatment,were evaluated using univariate and multivariate analyses to identify factors correlated to recurrence.Results:A total of 11(13.1%)patients presented with recurrence,with a mean time to recurrence of 14.2 months.The univariate analysis showed that the longer duration of menstruation(7.4 vs.6.0,P=0.010),the more advanced revised American Fertility Society(rAFS)stage(Stages I and II vs.III and IV,χ^(2)=9.964,P=0.001),the higher VAS score for dysmenorrhea(9.4 vs.5.2,P=0.001),and the more severe pain during defecation(7.8 vs.4.8,P=0.016)were positively correlated to DIE recurrence.However,the multivariate analysis also revealed that a more severe dysmenorrhea and advanced rAFS stage were the independent factors associated with the recurrence of DIE,with an odds ratio of 1.895(confidence interval[CI]:1.061-3.385,P=0.031)and 4.310(CI:1.091-17.028,P=0.037),respectively.Conclusions:More than 10%of patients presented with recurrence of DIE 2 years after surgery.Recurrence of DIE was more common in patients who complained of more severe dysmenorrhea and had an advanced rAFS stage.