Search for: [Abstract = "was carried out between July 2018 and January 2020 at the Outpatient Centre at the Neonatology Clinic of the University Hospital in Kraków, the Local Government Nursery No.33 in Krakow and the private physiotherapy practice Grzegorz Suder Physiotherapy in Liszki. The following methods were used for data collection\: documentation analysis, diagnostic survey and evaluation of functional development based on the Munich Functional Developmental Diagnostics for the 2nd and 3rd year of life. The chi\-square test was used to compare the value groups of the qualitative variables and the Kruskal Wallis test for the quantitative variables. The statistical analysis adopted non\-parametric tests in all the functional development ranges studied based on the Shapiro\-Wilk test. The results of the MFDR were analyzed between two groups using the Mann\-Whitney U test and between three or more groups using the Kruskal\-Wallis ANOVA ranking test. After detecting statistically significant differences, a post\-hoc Wilcoxson analysis with Bonferroni correction was performed. The analysis of the strength of the correlation between the variables was performed using the Spearman's rho correlation. Finally, a multifactorial linear regression was performed in order to verify whether the studied relationships will remain statistically significant after taking into account factors whose distribution differs be"]

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