using a complex two-stage cluster sampling plan, and personal interviews and defining CRS based on the EPOS criteria found a prevalence of 5.51% [15]. The prevalence of doctor-diagnosed using ICD-9 codes as an identifier of CRS in Olmsted, Minnesota reports a prevalence of 2% ...
The chronic hypertrophic rhinitis patients were retrieved with the International Classification of Disease, Ninth Revision, Clinical Modification (ICD-9-CM) operation code of 472.0 and turbinate submucosal reduction operation with an ICD-9-CM operation code of 21.6. Patients less than 18 years of age...