Development of caesarean section prediction models: secondary analysis of a prospective cohort study in two sub-Saharan African countries

Table 2 Performance measures for the complete and abridged models in the training and test samples

		Cut-off point	SP	SE	DA	NPV	PPV	AUC	AUC CI (95%)
Training sample
Admission	Model 1	16.12	78.72	63.84	76.84	93.79	30.18	77.76	76.01	79.50
2 h	Model 2	18.91	71.42	74.43	72.00	92.04	38.61	78.76	75.98	81.54
	Model 2A	18.96	66.43	76.44	68.59	91.10	38.55	78.07	75.44	80.70
4 h	Model 3	21.76	77.83	76.44	77.53	92.45	48.19	85.92	83.03	88.81
	Model 3A	32.02	85.04	71.28	82.04	91.40	57.02	85.65	82.86	88.44
6 h	Model 4	23.57	77.78	79.75	78.26	92.20	53.85	85.14	80.46	89.83
	Model 4A	35.96	86.40	62.82	80.79	88.16	59.04	84.31	79.60	89.02
Max. score	Model 5	13.66	87.90	85.20	87.56	97.61	50.60	93.80	92.88	94.71
	Model 5A	10.69	84.69	87.96	85.12	97.91	46.30	93.66	92.77	94.54
Test sample
Admission	Model 1	16.12	78.68	63.20	76.62	93.30	31.28	78.70	76.19	81.20
2 h	Model 2	18.91	70.15	67.65	69.64	89.52	36.51	75.88	71.50	80.27
	Model 2A	18.96	66.38	68.42	66.71	91.41	28.68	74.73	69.74	79.72
4 h	Model 3	21.76	77.17	76.00	76.92	92.21	47.50	85.29	80.79	89.78
	Model 3A	32.02	88.47	64.00	83.51	90.63	58.54	84.39	79.43	89.36
6 h	Model 4	23.57	76.58	77.78	76.81	93.41	44.68	85.19	77.42	92.95
	Model 4A	35.96	82.88	70.00	80.14	91.09	52.50	86.52	80.07	92.96
Max. score	Model 5	13.66	89.26	80.12	88.03	96.66	53.68	93.66	92.36	94.96
	Model 5A	10.69	84.69	86.81	84.95	97.81	44.92	93.72	92.33	95.11

*SP: Specificity, SE: Sensitivity, DA: diagnostic accuracy, NPV: negative predictive value, PPV: positive predictive value, AUC: area under the ROC curve, CI: Confidence interval (CI)

ISSN: 1742-4755