Statistical analyzes
Qualitative variables were described in terms of frequency and
percentage. The note of theoretical radiographic knowledge of the
residents has been described in terms of median and interquartile range.
The comparison of the radiographic theoretical knowledge scores of the
residents between the two sessions was evaluated using a rank test
signed of Wilcoxon.
The distribution of FHR evaluation grades was compared between the 2
sessions using a mixed ordinal regression model including the session as
a fixed effect and an internal random effect to take into account the
correlation between the different assessments by resident (27 scenarios,
2 sessions). To evaluate the impact of the training on the analyze of
the FHR by the residents, the reproducibility of the responses between
the 34 residents on the FHR graduation was evaluated using the
Krippendorff’s alpha coefficient with its confidence interval of 95%
[95% CI].
The FBS requested rate and the rate of correct estimation of the pH (if
requested) were compared between the 2 sessions using a mixed logistic
model including the session as a fixed effect and an effect internal
random.
The p-values were calculated with a significance level of 5%.
Statistical analyzes
were performed using the SAS software (SAS Institute version 9.4).