Statistical analyses were performed in order to compare background characteristics between different BMI groups using One-way Anova for continuous variables and X2-test for categorical variables. Post hoc tests were adjusted by the method of Tukey. A two-way Anova was used in order to analyze BMI groups and measurer simultaneously. A p-value of <0.05 was considered significant. Statistical analyses were performed using the Statistical Package for the Social Sciences (IBM SPSS Statistics, Chicago, IL, USA; version 22)