To enable the use of the Fisher's exact test, for analysing questions 7-12, two answer categories were created: 1) Yes/Cannot decide and 2) No.
T-test and ANOVA were used for samples with normal distribution, and the Mann–Whitney U and Kruskal-Wallis tests for analyses of samples with skewed distribution.
Proportions of correct responses to survey items were compared at the school level using Wilcoxon-Matched Pairs /Signed Ranks Tests for analyses of data from Group 1 schools (baseline, immediate post-test and delayed post tests) and for analyses of aggregate data from the 19 schools completing baseline surveys, the intervention and immediate post-tests.
For analysis of differences in facilities at baseline, analysis of variance (ANOVA) will be used, with Fisher's Exact test for analysing categorical variables.
Additionally, for the purpose of providing a testbed for analyses to be run against, the system contains two datasets from an Arabic and English forum identified to contain extremist content.
Deformity data were ordinal in nature and were therefore assessed using rank order tests the Mann-Whitney U-test for analyses with two variables and the Kruskal-Wallis test for analyses with three or more variables.
To investigate the differences between percentages, a test comparing two proportions was used (a two-sided test for analyses without directional hypotheses).
We employed Fischer's exact test for analyses of the relationship between the expression of these proteins and their histological types.
We used parametrical tests for normally distributed data, unpaired t-tests for comparisons of the two groups, repeated-measures analysis of variance (ANOVA) with Bonferroni´s multiple comparison test for analyses within a group and the Pearson coefficient for correlation analyses.
Significance tests were conducted using McNemar's test for analyses of paired categorical data and the paired t-test to analyse any changes in mean scores relating to knowledge and practice post-intervention that was measured using Likert scales.
