All regression patterns was indeed adjusted towards the baseline qualities computed inside the brand new univariate studies

Statistical investigation

Investigation of for every BPD severity classification were compared on one-way ANOVA, the latest Kruskal–Wallis shot to have persisted research, the chi-rectangular decide to try otherwise Fisher’s direct take to to possess categorical parameters, or z evaluation with modification to possess continuity getting size.

To adjust this new relationship anywhere between per BPD definition and outcomes for possible covariates, multivariate logistic regression are did each seriousness class to help you guess the odds ratio (OR) which have a beneficial 95% confidence period (CI). Sensitivity, specificity and you may positive and negative predictive opinions was indeed calculated for respiratory problems, GMFCS get, and you may NDI using multivariable logistic regression.

The brand new complement of activities is confirmed towards the Hosmer–Lemeshow goodness of-match try. All the analyses were performed utilizing the computer software SPSS variation 24.0 (SPSS Inc., Chi town, IL, USA). In all analyses, a beneficial p really worth less than 0.05 is actually felt mathematically extreme.

Studies accessibility

The brand new dataset reviewed within this research is not in public readily available owed on the plan out of Browse of your own Korea Centers getting Situation Manage and you may Prevention. However, datasets appear regarding involved journalist through to sensible demand.

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