The Prevalence of Asthma and Declared Asthma in Poland on the Basis of ECAP Survey Using Correspondence Analysis

Abstract

Results of epidemiological and public health surveys are often presented in the form of cross-classification tables. It is sometimes difficult to analyze data described in this way and to understand relations between variables. Graphical methods such as correspondence analysis are more convenient and useful. Our paper describes an application of correspondence analysis to epidemiological research. We apply the basic concepts of correspondence analysis like profiles, chi-square distance to medical data concerning prevalence of asthma. We aim at describing the relationship between asthma, region, and age. The data presented in this paper come from Epidemiology of Allergy in Poland (ECAP) survey in years 2006–2008. Correspondence analysis shows that there is a fundamental difference in the structure of age groups for people with symptoms compared to those who have declared asthma (regardless of the level of symptoms of asthma and the level of declaration). The variable which best differentiates declared asthma in all regions is “wheezing and whistling.” Correspondence analysis also shows significant differences between locations. Our analyses are performed in the R package “ca”.

Prevalence of Asthma Bronchiale in the Czech Republic and its Economic Burden

“…Regional prevalence of AB was also studied in Poland. This study showed differences in occurrence of AB among regions (Zalewska et al, 2013). Our current study has similar conclusions.…”

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“…Istotne zróżnicowanie częstości występowania chorób alergicznych ze względu na region i pochodzenie etniczne jest zjawiskiem dobrze udokumentowanych. W Polsce blisko 40% populacji choruje na alergie, w tym na ANN 25%, na astmę -5%, a objawy astmy ma blisko 12% ogółu badanych [9][10][11][12][13]. Średnio 1-40% przypadków ANN dotyczy alergii na pyłki roślin, natomiast 1-13% przypadków wiąże się z występowaniem przewlekłego ANN [9].…”