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Responsiveness and reliability of the Sinus Control Test in chronic rhinosinusitis
P Kohli1, Z M Soler1, K A Storck1
1Division of Rhinology and Sinus Surgery, Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA.
Background:
The Sinus Control Test (SCT) is a patient-reported questionnaire designed to help physicians identify sub-optimally controlled chronic rhinosinusitis (CRS). This study measures responsiveness to surgery and reliability of the SCT.
Methodology:
Adults meeting diagnostic criteria for CRS were recruited from rhinology clinics at a tertiary academic institution. To measure responsiveness, the SCT was administered at baseline and at least 3 months after surgery to 62 CRS patients. To measure reliability, the SCT was administered at two clinical encounters a maximum of 14 days apart to 22 CRS patients.
Results:
Total SCT scores significantly improved from baseline to post-operative follow-up, and the distribution of patients with total SCT scores falling into the uncontrolled, partially controlled, and controlled categories before and after surgery were significantly different in the direction of improvement. The SCT met minimum standards for reliability and internal consistency as measured by: test-retest reliability coefficient, intra-class correlation coefficients, and item-total correlations. Cronbach alpha; values with each item deleted were lower than the overall Cronbach alpha. The SCT captures the full range of disease control as measured by floor and ceiling effects.
Conclusion:
The SCT is responsive to surgical intervention and a reliable tool to monitor changes in CRS control levels.
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