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Importance: RSV is a common illness among young children that causes significant morbidity and health care costs. Objective: Routinely collected health administrative data can be used to track disease incidence, explore risk factors and conduct health services research. Due to potential for misclassification bias, the accuracy of data-elements should be validated prior to use. The objectives of this study were to validate an algorithm to accurately identify pediatric cases of hospitalized respiratory syncytial virus (RSV) from within Ontario’s health administrative data, estimate annual incidence of hospitalization due to RSV and report the prevalence of major risk factors within hospitalized patients. Study Design and Setting: A retrospective chart review was performed to establish a reference-standard cohort of children from the Ottawa region admitted to the Children’s Hospital of Eastern Ontario (CHEO) for RSV-related disease in 2010 and 2011. Chart review data was linked to Ontario’s administrative data and used to evaluate the diagnostic accuracy of algorithms of RSV-related ICD-10 codes within provincial hospitalization and emergency department databases. Age- and sex-standardized incidence was calculated over time, with trends in incidence assessed using Poisson regression. Results: From a total of 1411 admissions, chart review identified 327 children hospitalized for laboratory confirmed RSV-related disease. Following linkage to administrative data and restriction to first admissions, there were 289 RSV patients in the reference-standard cohort. The best algorithm, based on hospitalization data, resulted in sensitivity 97.9% (95%CI: 95.5–99.2%), specificity 99.6% (95%CI: 98.2–99.8%), PPV 96.9% (95%CI: 94.2–98.6%), NPV 99.4% (95%CI: 99.4–99.9%). Incidence of hospitalized RSV in Ontario from 2005–2012 was 10.2 per 1000 children under 1 year and 4.8 per 1000 children aged 1 to 3 years. During the surveillance period, there was no identifiable increasing or decreasing linear trend in the incidence of hospitalized RSV, hospital length of stay and PICU admission rates. Among the Ontario RSV cohort, 16.3% had one or more major risk factors, with a decreasing trend observed over time. Conclusion: Children hospitalized for RSV-related disease can be accurately identified within population-based health administrative data. RSV is a major public health concern and incidence has not changed over time, suggesting a lack of progress in prevention. [ABSTRACT FROM AUTHOR]

Objective: To measure the impact of chronic rhinosinusitis (CRS) on the health of Nova Scotians and evaluate the role of surgery in modifying this impact. Methods: Nova Scotia residents with CRS referred to one otolaryngologist were enrolled. The Chronic Sinusitis Survey (CSS) and Short Form 36-Item Health Survey (SF-36) were administered preoperatively and at two postoperative visits. The SF-36 data were compared with Canadian published norms. Also, the postoperative survey results were compared with preoperative data to evaluate the role of surgery in improving health. Results: Thirty-eight patients completed preoperative and 3-month forms, and 26 patients completed preoperative and 3- and 12-month postoperative forms. Patients with CRS showed a significant decrease in five of eight SF-36 subscales. Surgery significantly improved preoperative scores for six of eight subscales and both the physical (PCS) and mental (MCS) component summary scores (p < .05). Males were more likely than females to report postoperative improvements (p = .02). Males under 50 years were more likely to show improvement in the PCS score (p = .02), with no significant change in the MCS score. Females under 50 years were more likely to show improvement in the MCS score (p = .02), with age having no effect on PCS score. Conclusion: This study confirms that Canadians with CRS have lower quality of life and for the first time in Canada demonstrates that functional endoscopic sinus surgery can restore health. Males showed a greater response than females, and patients under 50 years were more likely to improve after surgery. This information on patient factors influencing outcomes may help physicians when counseling patients regarding surgery for CRS. [ABSTRACT FROM AUTHOR]