Associations between endometriosis and allergy‐related diseases as well as different specific immunoglobulin E allergy: A cross‐sectional study

Abstract Aim To explore the associations between endometriosis and different kinds of allergy‐related diseases as well as different specific immunoglobulin E (IgE) allergy. Methods This cross‐sectional study included 1332 female participants ≥20 years and divided them into the endometriosis group ( n = 97) and the nonendometriosis group ( n = 1235). The confounders were obtained by comparing the differences of variables in groups. Univariate and multivariate logistic regression analyses were performed to analyze the associations between endometriosis and allergy‐related diseases as well as different specific IgE allergy. Subgroup analysis were performed in age, body mass index (BMI), and pregnancy history. Results After adjusting for confounders, increased risk of allergy (odd ratios [OR] = 2.13, 95% confidence interval [CI]: 1.31–3.47), hay fever (OR = 2.31, 95%CI: 1.32–4.06), and dog‐specific IgE (OR = 2.13, 95%CI: 1.03–4.41) were observed in females with endometriosis. Among females aged between 30 and 39 years, the risk of allergy (OR = 3.51, 95%CI: 1.07–11.56), hay fever (OR = 3.26, 95%CI: 1.08–9.83), and dog‐specific IgE (OR = 4.39, 95%CI: 1.02–18.88) was increased in patients with endometriosis compared with those without. In terms of females aged 40 to 49 years, the risk of hay fever was increased in patients with endometriosis. For females with BMI of 25–30 kg/m 2 , the risk of allergy was increased in patients with endometriosis. Increased risk of allergy, hay fever, and dog‐specific IgE was observed in females with a history of pregnancy. Conclusion Endometriosis was associated with higher risk of allergy, hay fever, and dog dander. Special care should be provided for patients with endometriosis for the potential risk of allergy.