Table 3.

Results of ten-fold cross-validation for fetal lung gestational age grading model, (%).

	Class I			Class II			Class III
Validation sequence	Specificity	Sensitivity	Accuracy	Specificity	Sensitivity	Accuracy	Specificity	Sensitivity	Accuracy	Average accuracy
1	78.9	90.5	92.9	88.9	73.9	84.8	84.2	81.2	91.3	82.9
2	76.4	90.3	93.7	91.1	74.6	84.2	82.2	83.4	89.5	84.0
3	77.0	92.3	93.4	87.2	67.8	83.0	83.5	88.7	89.3	83.7
4	78.2	90.5	92.1	88.2	73.9	84.4	84.1	85.5	91.4	84.5
5	78.9	92.6	93.7	91.2	72.2	85.2	84.3	88.3	91.5	85.2
6	75.9	93.2	91.8	93.7	63.3	83.0	81.6	94.7	91.5	84.3
7	74.2	91.4	93.3	88.4	68.1	84.1	82.5	82.2	88.6	82.4
8	73.1	96.0	92.8	91.6	67.0	83.3	84.7	81.8	91.2	84.1
9	78.2	87.8	91.9	87.7	71.6	83.3	82.1	87.5	91.1	83.2
10	76.6	92.7	93.5	92.0	65.9	84.3	82.0	90.6	90.2	84.0
Average	76.8	91.7	92.9	90.0	69.8	84.2	83.1	86.4	90.6	83.8