The outcome of endoscopic sinus surgery: correlation with computerized tomography score and systemic disease.

We have prospectively analysed the outcome of patients undergoing endoscopic sinus surgery for chronic rhinosinusitis in relation to the Lund and Mackay system of scoring the preoperative computerized tomography scan for extent of disease, and also investigated the possible links of outcome to the presence or absence of systemic respiratory tract conditions which may relate to the pathogenesis of chronic rhinosinusitis. Statistical analysis of the data by chi 2 test, unpaired t-test and logistic regression analysis has shown significant correlation between outcome at 2 years and preoperative computerized tomography scan score, but that the most statistically significant factor determining the success or failure of surgery is the presence of a systemic disease known to predispose to chronic rhinosinusitis.