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Background: This study was conducted to assess the effect of comorbidity, ethnicity, occupation, smoking and place of residence on allergic rhinitis (AR), acute rhinosinusitis (ARS) and chronic rhinosinusitis (CRS). Methods: A GA2LEN (The Global Allergy and Asthma European Network) screening questionnaire was sent to a random sample of the Dutch population (n = 16700) in three different areas of the Netherlands. Results: Fifty percent (8347) of the questionnaires sent were returned. A total of 29% respondents (27–31% in different areas) met the criteria for AR, 18% (17–21%) for ARS and 16% (13–18%) for CRS. Risk factors for AR were itchy rash, eczema, adverse response after taking a painkiller, asthma, CRS and ARS. Moreover, the risk of AR was twice as low for full-time housewives/househusbands than for people with jobs. The risk of ARS or CRS was significantly higher in respondents with a doctor’s diagnosis of CRS, AR, itchy rash or smoking. The risk of CRS was also significantly higher in respondents with an adverse response after taking painkillers, active smoking or asthma. Caucasians are generally less likely to have AR or CRS than Latin-Americans, Hindustani and African-Creoles, and more likely to have ARS than Asian, Hindustani, Mediterranean and African-Creoles. Conclusions: This study found shared and distinct risk factors for AR, ARS and CRS and therefore provides support for the belief that they have shared symptoms but are different diseases with different aetiologies. [ABSTRACT FROM AUTHOR]

Objective: To identify patient groups at risk for Adverse Patient Occurrences (APOs) to improve the quality of care. Study Design: This study was conducted using retrospective analysis. Methods: APOs have been systematically registered from 1997 to 2006 in all patients (6,932) admitted to the otorhinolaryngology-head and neck surgery department of the University Hospital Maastricht, the Netherlands. Several characteristics such as length of stay, age, gender, season, and diagnosis were related to the incidence and type of APOs. Results: Increasing age and length of stay are related to an increasing incidence of APOs. Children are found to beat high risk too and outpatient treatment (<24 h) is a risk factor for APOs. Of all APOs, 67% were organizational and 33% medical. The three diagnosis-related groups (DRGs), in which APOs occurred most, were the inner ear/cerebellopontine angle (CPA), esophagus, and head and neck oncology group. No seasonal influences on APO occurrences existed. Conclusions: Male and female patients >60 or <10 years old are at the highest risk for APOs. Their risk increases with their length of stay and is high when admitted less than 24 hours. When patients are among the three most prevalent DRGs, their risk is even higher. [ABSTRACT FROM AUTHOR]