Descriptive analysis and statistical methods

SM Søren Mikkelsen
CM Caroline Schaffalitzky de Muckadell
LB Lars Grassmé Binderup
HL Hans Morten Lossius
PT Palle Toft
AL Annmarie Touborg Lassen
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Quantitative data are presented as proportions, median and quartiles or range (where appropriate). Proportions are presented with 95% confidence intervals (CI) based on a binomial distribution. All quantitative data were analysed using non-parametric statistics (Chi-square or Kruskal-Wallis). Differences were considered significant when p < 0.05.

All statistical calculations were performed using STATA 14.1 (StataCorp, Texas, USA).

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