Mathematical studies

Study off each BPD seriousness group was compared on one-way ANOVA, brand new Kruskal–Wallis try to have persisted research, new chi-square attempt otherwise Fisher’s precise try for categorical variables, otherwise z evaluation which have correction getting continuity to possess size.

To regulate the relationship anywhere between for every single BPD definition and you will results for potential covariates, multivariate logistic regression is did per severity class so you’re able to imagine chances ratio (OR) which have an excellent 95% count on interval (CI). Susceptibility, specificity and you will negative and positive predictive thinking was indeed calculated getting breathing ailment, GMFCS score, and you may NDI playing with multivariable logistic regression.

This new match of your activities was confirmed into the Hosmer–Lemeshow goodness out of-fit test. The analyses was in fact did utilizing the software program SPSS version twenty-four.0 (SPSS Inc., Chicago, IL, USA). In all analyses, a great p value lower than 0.05 are believed statistically high.

Investigation accessibility

The newest dataset reviewed inside research isn’t in public places readily available due towards coverage away from Browse of one’s Korea Centers for Disease Manage and Cures. Yet not, datasets are available throughout the relevant publisher on sensible demand.

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