Comparisons of survival distributions between different categories were made using the log rank test.
Relationships between different categories were identified by constant comparison between and within transcripts and by comparison with existing literature.
Categorical variables, where the interval between different categories is not meaningful or consistent, cannot support such an approach.
Survival and CAV-free survival time was analyzed using the Kaplan Meier procedure and statistical comparisons of survival distributions between different categories were made using the log rank test.
The difference between the means of each of the different categories was tested for significance using an exact Wilcoxon rank-sum two-sample test as described above.
Branch lengths from the combined-data tree were used to determine the mean branch length for each category, and the difference between the means of each of the different categories was tested for significance using an exact Wilcoxon rank-sum two-sample test (equivalent to a Mann-Whitney U test).
Meanwhile, the overlap factors (OFs) between two methods from different categories are significantly lower.
Overall discrepancy counts, and overall counts for the different categories, were compared between the 50 retracted and the 50 unretracted reports by the Wilcoxon signed-rank test.
Biri et al.'s cross-sectional study reports the frequency of psychosocial symptoms as between 41 and 64%, in which four different categories were defined as psychosocial complaints: anxiety, feeling of stress, touchiness and self-depression, and absent-mindedness [ 12].
The first model is the frequency matrix, which gives the change length frequencies between different categories and is only valid in the range of observed data.
