Statistical analyses
SSNS
Continuous data were presented as means (standard deviation (SD)) or median (range), depending on distribution. Normality of the data was checked through histograms and QQ plots. For continuous data, we used an independent Thermometer scores, domain scores, item scores, and additional questions of mothers and fathers of children with SSNS were compared to scores of reference mothers and fathers, respectively. In the case of baseline differences, the association with the thermometer score was tested by Pearson’s coefficient. If significant, an ANOVA (continuous data) or the Mantel–Haenszel test (discrete data) was used to correct for confounders.To identify which sociodemographic and clinical variables (Online Resource 1 Table For all statistical analyses, IBM SPSS Statistics [