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• W4385477653 abstract "Abstract Background Ambient PM2.5 is associated with asthma exacerbation. The association between the concentration of PM2.5 and the severity of asthma exacerbation has yet to be thoroughly clarified. The study aims to explore the association between the piror 30 days average concentration of PM2.5 and the severity of acute asthma exacerbation in hospitalized children. Methods A total of 269 children with acute exacerbation of asthma were enrolled and divided into three groups according to the PM2.5 exposure concentrations: group 1 (PM2.5: <37.5 μg/m 3 ), group 2 (PM2.5: 37.5–75 μg/m 3 ), group 3 (PM2.5: ≥75 μg/m 3 ), respectively. The ordered logistic regression modeling was conducted to explore the influence of daily PM2.5 concentration on the clinical severity of children's asthma exacerbation. Multiple linear regression was conducted to explore the association between the concentration of PM2.5 and the length of stay in the hospital (LOS). We also conducted a receiver operating characteristic (ROC) curve analysis to explore the cutoff value of PM2.5 to predict the children's asthma exacerbation. Results There was no statistical difference among the three groups of children in gender, age, body mass index, ethnicity, the first diagnosis of asthma, allergic history, passive smoke exposure, or family history of asthma. There was a statistically significant difference in many hospitalization characteristics ( p < 0.05) among the three groups of children. Significant differences were found in terms of accessory muscles of respiration ( p = 0.005), respiratory failure ( p = 0.012), low respiratory tract infectious ( p = 0.020), and the severity of asthma exacerbation ( p < 0.001) among the three groups. PM2.5 concentration was primarily positively correlated to neutrophile inflammation. The ordered multivariate logistic regression model showed that higher PM2.5 concentrations were significantly associated with greater odds of more severe asthma exacerbation in one and two‐pollutant models. The adjusted odds ratio of severe asthma exacerbation was 1.029 (1.009, 1.049) in the one‐pollutant model. The most significant odds ratio of severe asthma exacerbation was 1.050 (1.027, 1.073) when controlling NO 2 in the two‐pollutant models. Multiple linear regression showed that PM2.5 concentration was significantly associated with longer LOS in both one‐pollutant and two‐pollutant models. By performing ROC analysis, the average daily concentration of 44.5 µg/m 3 of PM2.5 (AUC = 0.622, p = 0.002) provided the best performance to predict severe asthma of children exacerbation with a sensitivity of 59.2% and a specificity of 63.8%. Conclusion The increased prior 30 days average concentration of PM2.5 was associated with greater asthma exacerbation severity and longer length of stay in the hospital of children with asthma exacerbation." @default.
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• W4385477653 date "2023-08-02" @default.
• W4385477653 modified "2023-10-17" @default.
• W4385477653 title "The association between PM2.5 concentration and the severity of acute asthmatic exacerbation in hospitalized children: A retrospective study in Chongqing, China" @default.
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• W4385477653 doi "https://doi.org/10.1002/ppul.26557" @default.
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