Statically Analysis:
The classification of the uterine cavity was decided with “consensus rate 60 %” which is described as at least 6 of 10 evaluators agreed on consensus on shape of the cavity.
The distribution of data was assessed with histograms. Depending on distribution characteristics, continuous variables were defined with mean (standard deviation) or median (25th and 75th percentiles). Categorical variables were defined as percentages. One-way analysis of variance (ANOVA), Student T test, Mann Whitney U test or chi-square test and its derivatives were used for between group comparisons. A two tailed p value < 0.05 was considered as statistically significant. Spearman and Pearson correlation analysis was used to determine any correlation between variables.