Comparing Seasonal Pattern of Laboratory Confirmed Cases of Pertussis with Clinically Suspected Cases

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Abstract

Objectives: During recent decades, there has been limited attention on the seasonal pattern of pertussis within a high vaccine coverage population. This study aimed to compare the seasonal patterns of clinical suspected pertussis cases with those of laboratory confirmed cases in Iran. Methods: The current study was conducted using time series methods. Time variables included months and seasons during 2011-2013. The effects of seasons and months on the incidence of pertussis were estimated using analysis of variance or Kruskal-Wallis. Results: The maximum average incidence of clinically confirmed pertussis was 23.3 in July (p = 0.04), but the maximum incidence of clinical suspected pertussis was 115.7 in May (p = 0.6). The maximum seasonal incidences of confirmed and clinical pertussis cases were reported in summer (average: 12, p = 0.004), and winter (average: 108.1; p = 0.4), respectively. Conclusion: The present study showed that the seasonal pattern of laboratory confirmed pertussis cases is highly definite and different from the pattern of clinical suspected cases.

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APA

Ghorbani, G. R., Zahraei, S. M., Moosazadeh, M., Afshari, M., & Doosti, F. (2016). Comparing Seasonal Pattern of Laboratory Confirmed Cases of Pertussis with Clinically Suspected Cases. Osong Public Health and Research Perspectives, 7(2), 131–137. https://doi.org/10.1016/j.phrp.2016.02.004

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