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. 2024 Feb;29(9):2300355.
doi: 10.2807/1560-7917.ES.2024.29.9.2300355.

Burden of chickenpox complications in Poland, 2006 to 2021: A comprehensive registry-based study

Rafał Halik  1 , Iwona Paradowska-Stankiewicz  2 , Aneta Trochonowicz  1 , Swavik Dittmer  3
Affiliations

Burden of chickenpox complications in Poland, 2006 to 2021: A comprehensive registry-based study

Rafał Halik et al. Euro Surveill. 2024 Feb.

Abstract

BackgroundChickenpox, a vaccine-preventable disease caused by the varicella zoster virus, generally presents with mild symptoms but can cause complications necessitating hospitalisation. In Poland, since 2009, vaccination has been obligatory for children up to 12 years of age who are particularly vulnerable to infection and for children in their vicinity.AimTo examine the burden of chickenpox complications and the trends of hospitalisation arising from these complications over time in the Polish population.MethodsData spanning 2006-21 were sourced from the Polish Infectious Diseases Surveillance System, the Nationwide General Hospital Morbidity Study and the Statistics Poland death registry. Standardised and age-specific incidence rates, hospital discharge rates and number of deaths because of chickenpox were calculated. Moreover, the joinpoint regression model was used to analyse trends of annual hospital discharge rates.ResultsOver the analysed timeframe, 25,804 hospitalisations and 52 deaths attributable to chickenpox complications were documented, and 1.0% of chickenpox cases required hospitalisation because of chickenpox. Age-standardised hospitalisation rates varied between 2.3 and 9.6 per 100,000 population. The analysis revealed no statistically significant trend in overall hospital discharge rates from chickenpox complications. However, a notable increase in hospitalisation rates was observed in children aged 0-4 and among inhabitants of rural areas, with annual percentage changes of 4.9% and 3.4% respectively.ConclusionsOur findings suggest that the implementation of a universal chickenpox immunisation programme, supported by health education, should be considered to reduce the number of hospitalisations and nearly eliminate deaths because of chickenpox.

Keywords: chickenpox; chickenpox complications; chickenpox prevention; surveillance.

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Conflict of interest statement

Conflict of interest: None declared.

Figures

Figure 1
Figure 1
Incidence rates of chickenpox per 100,000 populationa and hospital discharge ratesb from chickenpox complications, Poland, 2006–2021
Figure 2
Figure 2
Age-specific incidence rates of chickenpox per 100,000 populationa and hospital discharge rates because of chickenpox complicationsb, Poland, 2006–2021
Figure 3
Figure 3
Number of deaths from chickenpox complications as an underlying cause of death, delineated by year and age group, Poland, 2006–2021 (n = 52)
See this image and copyright information in PMC

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