Differences between groups were tested with one-way ANOVA and Tukey-Kramer post-hoc test.
Statistically significant differences between groups were tested using Tukey's HSD test P < 0.05.
In b d, statistically significant differences between groups were tested using Tukey's HSD test P < 0.05.
Differences of means between groups were tested for statistical significance with Student t test, and a P value < 0.05 was considered statistically significant.
Differences in categorical data between groups were tested with the chi-square test.
Unadjusted differences between groups were tested using t tests and, where noted, Fisher's exact tests.
When applied, further differences between groups were tested by un-paired t-tests.
Differences in ratings between groups were tested with paired T-tests, one for each modality.
Statistical differences between groups were tested using the non-parametric Wilcoxon's test.
Differences in outcome between groups were tested with the log-rank test.
Differences between groups were tested with one-way ANOVA.
