Correlation of Lund-Mackay and SNOT-20 Before and After Functional Endoscopic Sinus Surgery (FESS): Does the Baseline Data Predict the Response Rate?

Background/Objective: To assess whether baseline SNOT-20 and Lund-Mackay score can predict response to FESS. Materials and Methods: For 50 consecutive patients who underwent functional endoscopic sinus surgery (FESS) for chronic rhinosinusitis (CRS) in a university-affiliated hospital from January 2006 to February 2007, SNOT-20 and Lund-Mackay scores were evaluated preoperatively and after three months postoperatively. Results: Pearson’s correlation coefficient of the Lund-Mackay score and SNOT-20 score was 0.77 before FESS and 0.73 after FESS (p <0.001). All multivariate regression models for evaluating whether the primary symptoms and CT scan findings predict the response rate showed a weak to moderate fitness to primary data based on all symptom domains and in each model, only the primary symptom domain of the dependent variable remain in the model. Conclusion: The outcome of FESS in patients with CRS is moderately related to primary symptoms according to SNOT-20 as well as the Lund-Mackay radiologic score.