Table 1.
Item scoring protocol per organ system.
Table 2.
Study population (n = 64).
Table 3.
Characteristics of the sonographers.
Table 4.
Agreement analysis per organ system–intraclass correlation coefficient (ICC).
Fig 1.
CUSUM analysis showing a learning curve for the fetal brain.
Where y = 0 represents the 13-week anomaly scans performed by the sonographers throughout the study period. H0 and H1 represent the lower and upper limits of the CUSUM graph, which should not be crossed by the CUSUM plot (in yellow) for the process to not go out of control. CUSUM represents the learning curve obtained by CUSUM analysis, where a decreasing slope indicates a positive learning process and thus an improvement in performance, as in this case.
Fig 2.
CUSUM analysis showing an out-of-control pattern for the fetal heart.
Where y = 0 represents the 13-week anomaly scans performed by the sonographers throughout the study period. H0 and H1 represent, respectively, the lower and upper limits of the CUSUM graph, which should not be crossed by the CUSUM plot (in yellow) for the process to not go out of control. CUSUM represents the learning curve obtained by CUSUM analysis. In this case the CUSUM line crosses the upper limit, therefore showing an out of control pattern and thus no clear change in performance.
Table 5.
Proportion of logbooks with acceptable scores (> = 70%) per organ system and per sonographer.
Table 6.
Organ-specific CUSUM analysis.
Table 7.
Item scores for the evaluation of the ultrasound images per organ system.