2.9. Statistical Analysis

FM Francesca von Matthey
KS Karola Schmid
MZ Michael Zyskowski
SD Stephan Deiler
PB Peter Biberthaler
HV Helen Vester
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The statistical analysis was performed by Sigmastat (Microsoft, Erkrath, Germany) according to the data quality descriptively or analytically by Mann–Whitney U test for ordinal distributed data or t-test for independent samples for normally distributed data. A paired t-test or a signed-rank test was performed to compare dependent data. The data was also described according to the data quality in (%) or as mean ± SEM. A level of significance as p < 0.05 was accepted.

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