Table 3.

Predictive model vs reference standard for ESS-CRS status

Model output	Reference standard		Total
	Case	Control
Case	333	16	349
Control	14	184,991	185,005
Total	347	185,007	185,354

Predictive model based on administrative database codes

CCI Canadian Classification of Health Interventions, CRS Chronic rhinosinusitis, ESS Endoscopic sinus surgery, ICD-10 International Classification of Disease, version 10