Justification of parametric testing was checked with diagnostic tools available in R and visual inspection of residuals.
Liver function tests were checked daily and a liver biopsy performed 15 days after graftectomy.
Assumptions underlying each statistical test were checked, and appropriate measures were taken when assumptions were not met.
Tests were checked to see whether the order of questions, name or word familiarity or other factors affected how people responded, but the results remained much the same.
Assumptions of the tests were checked using Kolmogorov-Smirnov (normality) and Bartlett's χ2 test (homogeneity of variance).
Because of this high level of resistance the quality of the WHO papers used for the tests were checked for insecticide concentration.
Liver function tests were checked every 3 days.
Differences between tests were checked by χ method, significance being set at P<0.05.
The results of parametric tests were checked using non-parametric tests including Spearman's rank order correlation coefficients and the Kruskal-Wallis test.
Data of functional outcomes (TUAG, CSAR, BS tests) were checked for extreme values and extreme pre post changes (± >2 standard deviations) prior to the analysis.
