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

Background/ To assess whether baseline SNOT-20 and Lund-Mackay score can predict response to FESS. 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. 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. 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.