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  • Title: Role of season, temperature and humidity on the incidence of epistaxis in Alberta, Canada.
    Author: Sowerby LJ, DeSerres JJ, Rudmik L, Wright ED.
    Journal: J Otolaryngol Head Neck Surg; 2014 Apr 22; 43(1):10. PubMed ID: 24755112.
    Abstract:
    BACKGROUND: Classical dogma holds that epistaxis is more common in winter months but there is significant variability reported in the literature. No study has yet examined the effect of season, humidity and temperature on epistaxis in a location with as severe weather extremes as seen in Alberta, Canada. The objective of the study is to evaluate for an effect of these meteorological factors on the incidence of epistaxis in Alberta. METHOD: A retrospective review of consecutive adult patients presenting to the Emergency room (ER) in Edmonton and Calgary, Alberta over a three-year period was performed. Daily temperature and humidity data was recorded from the respective airports. Statistical analysis with Pearson's correlation coefficient was performed. RESULTS: 4315 patients presented during the study period. Mean daily temperatures ranged from a low of -40°C to a high of +23°C. A significant negative correlation was found for mean monthly temperature with epistaxis (Pearson's r = -0.835, p = 0.001). A significant correlation was also present for daily temperature and epistaxis presentation (Pearson's r = -0.55, p = 0.018, range 1.8 to 2.2 events/day). No correlation was identified with humidity and no significant seasonal variation was present. CONCLUSIONS: A negative correlation was found to exist for both daily and mean monthly temperature with rates of epistaxis. A seasonal variation was seen in Edmonton but not in Calgary. No correlation was found for humidity when compared to both presentation rates and admissions.
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