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A multivariate logistic regression model for the risk factors of COPD exacerbation using computed tomography (CT) indices
Hosmer-Lemeshow goodness-of-fit showed chi-square = 10.41 and P = 0.24, showing good fit of the models; C-statistics value was 0.643. ATI, air trapping index. All radiologic indices irrespective of the result of univariate analysis were included in the multiple logistic regression.
