Some of the more commonly used instruments include the Sino-Nasal Outcome Test (SNOT-20), (22) the Rhinosinusitis Disability Index (RSDI), (23) the Rhinoconjunctivitis Quality of Life Questionnaire
(RQLQ), (24) and the Nasal Health Survey (NHS), formerly designated the Chronic Sinusitis Survey (CSS).
Outcomes measured At each visit, patients were asked to complete the Rhinoconjunctivitis Quality of Life Questionnaire
. This is a 28-item disease-specific instrument designed to measure the functional impairments most important to patients with seasonal allergic rhinoconjunctivitis: sleep impairment, fatigue, practical problems, nasal symptoms, eye symptoms, activity limitations, and emotional function.