Statistical analysis
REGRESSION
Demographic and diagnostic variables were collected at T0. Continuous variables were described as median with interquartile range (IQR); categorical variables were summarized as frequencies and percentages. Student´s t-tests were applied, to detect differences; p-values < 0.05 were considered to be significant. Multivariable linear regression analyses were performed to identify influencing factors and to address potential sources of bias and confounders. In order to yield reliable model results, stepwise regression selections were performed and models with high adjusted 