The Kruskal–Wallis and Chi-squared tests were used to compare numbers and ratios, respectively. A multivariable logistic regression analysis was performed to analyze the effect of several independent variables (location, Japanese cedar, pine, alder, ragweed, and Japanese hop sensitizations). A p-value of <0.05 was considered statistically significant. All statistical analyses were completed using Statistical Package for Social Sciences software, version 25.0 (SPSS Inc., Chicago, IL, USA).
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