Table 6

Data analysis

Data type	Statistical test
Normally distributed continuous variables for example, FIQR	Student’s paired t test
Non-parametric ordinal data for example, tender point count	Wilcoxon signed-rank test (will be used to compare pretreatment and post-treatment scores)
Categorical data for example, marital and employment status	Fisher’s exact test
Paired continuous data for example, comparison of mean scores pretreatment and post-treatment	Student’s paired t test
Subgroup analysis for example, gender and ethnicity comparisons	One-way analysis of variance
Non-parametric data (if assumptions of normality not met)	Wilcoxon signed-rank test Mann-Whitney test Kruskal-Wallis analysis