* In patients undergoing endoscopic sinus surgery for chronic rhinosinusitis, there is a lack of a universally accepted system for the evaluation of outcome. * This makes critical comparison between results less meaningful. * To determine the most suitable sinonasal outcome scoring system for use in our own practice, we reviewed the available literature and known systems in existence. * We analysed 15 known disease-specific sinonasal outcome indices with emphasis on reliability, validity and responsiveness. * We concluded by choosing one quality of life outcome tool for our departmental use, the Sinonasal Outcome Test-22, due to its reliability, validity, responsiveness and ease of use. * It has been validated to distinguish between disease-affected patient groups and those without rhinosinusitis, demonstrate a worse score if the condition gets worse and show an appropriateness of items and scales in the questionnaire. This has been demonstrated in 3128 British patients.