Abstract:Objective To explore the curative effect of endoscopic sinus surgery for fungal sinusitis and the influencing factors of postoperative recurrence.Methods 163 patients with fungal sinusitis from April 2019 to April 2022 were selected as the study subjects. Among them, 117 patients in the observation group were treated with endoscopic sinus surgery. The control group (46 cases) was treated with radical maxillary sinusotomy. The patients in the observation group were divided into training set (78 cases) and verification set (39 cases) at a ratio of 2∶1 according to the random number method. The patients in the training set were divided into postoperative recurrence group (27 cases) and postoperative non recurrence group (51 cases) according to whether the patients recurred or not. To compare the therapeutic effect of fungal sinusitis between the observation group and the control group. The clinical data of patients in the training set were compared, and the influencing factors of postoperative recurrence were analyzed by univariate and multivariate analysis. Build Bayesian network model through R software, and make inference and prediction of the model. The effectiveness of the model was verified by receiver operator characteristic curve (ROC curve) and calibration curve.Results The effective rate of fungal sinusitis in the observation group was 70.94%, significantly higher than 52.17% in the control group, with a statistically significant difference (χ2 = 5.16, P = 0.023); The recurrence rate of the observation group was 29.91%, significantly lower than 47.83% of the control group, and the difference was statistically significant (χ2 = 4.66, P = 0.031). The Lund-Mackay score > 15 points, smoking, asthma, multiple nasal polyps, high eosinophil count and postoperative infection were independent risk factors for postoperative recurrence (P < 0.05). The AUC of the training set and validation set were 0.767 (95%CI: 0.699 ~ 0.835) and 0.741 (95%CI: 0.668 ~ 0.813), respectively, with ROC curve specificity of 90.42% and 90.23%, respectively, the sensitivity of 90.18% and 90.06% respectively.Conclusion Endoscopic sinus surgery has a significant effect on fungal sinusitis. Lund-Mackay score > 15 points, smoking, asthma, multiple nasal polyps, high eosinophil count and postoperative infection are risk factors for postoperative recurrence of patients undergoing endoscopic sinus surgery.