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 |
FIQR, Fibromyalgia Impact Questionnaire.