Statistical analysis
Statistical analysis was performed using the SPSS software (IBM Statistical Package for the Social Science Statistics, version 24.0, Chicago, IL). The normality of the data distribution was assessed by the Kolmogorov-Smirnov test. Values were expressed as means ± standard deviation (SD) for continuous variables, median and interquartile range (IQR) for nonparametric data, or number and percentage (%) for categorical variable. The Mann-Whitney test and Student’s t test were used to compare nonparametric and normal data respectively while the χ2 was used to compare categorical variables. The rescued images were subsequently reviewed by the same operators who defined the score. Inter-observer reliability with Cohen’s kappa was defined: .81 ± 1.00 excellent, .61 ± .80 good, .41 ± .60 moderate, .21 ± .40 fair, > 0 ± .20 slight, and 0 absent. A p value < .05 was considered statistically significant.