SNOT-22 score patterns strongly negatively predict chronic rhinosinusitis in patients with headache.BACKGROUND
 The objective of this study was to evaluate the 22-item Sino-Nasal Outcome Test (SNOT-22) score patterns in patients with confirmed non-sinogenic headache in order to develop negative predictors of CRS.


 The optimal cutoff points of potential predictors of non-sinogenic headache by SNOT-22 score were quantified by receiver operating characteristic (ROC) curve.  Patients with non-sinogenic headache have distinct SNOT-22 score patterns compared with patients with CRS. 
SNOT-22
The optimal cutoff points of potential predictors of non-sinogenic headache by SNOT-22 score were quantified by receiver operating characteristic (ROC) curve. 
receiver operating characteristic (ROC)
Institutional Review Board (IRB)-approved, retrospective review of patients diagnosed with CRS or non-sinogenic headache defined as patients with a chief complaint of headache, facial pain, and facial pressure in the absence of both endoscopic and computed tomography (CT) evidence of inflammation. 
computed tomography (CT)