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Surgical Management of Chronic Rhinosinusitis

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7 Table 3. Outcome Measures and Endoscopic Grading Systems (cont'd) Metric category Instrument name Description Scoring details MCID Endoscopic metrics Lund- Kennedy endoscopic score Endoscopic assessment scoring system evaluating the severity of mucosal disease and anatomical variations in the sinuses, including polyps, edema, discharge, scarring, and crusting. Various anatomical sites are assessed and assigned scores from 0 to 2, ranging from 0 involvement to severe involvement. Total scores range from 0 to 20, with higher scores indicating more severe disease. N/A Modified Lund- Kennedy endoscopic score Modification of the original Lund-Kennedy endoscopic score. Excludes the subscores of scarring and crusting to improve reliability and applicability to nonsurgical patients. Measures edema, polyps, and discharge on the same 0 to 2 scale as the Lund-Kennedy score, for a possible score of 6 on each side and total possible score of 12. N/A Olfactory Cle Endoscopy Scale (OCES) Endoscopic tool evaluating each olfactory cle for discharge, polyps, edema, crusting, and scarring. Scored on a scale of 0 to 2, with increasing number indicating greater involvement of the olfactory cle. Total scores range from 0 to 20, with higher scores representing increased disease severity. N/A Nasal polyp score Quantifies the severity of nasal polyps based on their size, extent, and characteristics observed during endoscopy. Polyps are graded on a scale from 0 (no polyps) to 4 (large polyps obstructing entire inferior nasal airway) based on size and distribution, with higher scores indicating more severe disease. N/A a A change of 8.9 and 12 has been defined as the MCID among patients with CRS receiving surgical versus medical therapy, respectively, though different studies have used different cutoffs for meaningful differences in patients with CRS.

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