Table 4.

Prediction parameters for the IPVPI total score.

Score	Sensitivity	Specificity	Overall rate of correct classification	LR+	LR–
0	100.0	0.0	11.2	1.00
1	93.8	16.7	25.3	1.13	0.37
2	79.5	47.2	50.8	1.51	0.44
3	61.1	71.9	70.7	2.18	0.54
4	45.8	86.5	82.0	3.40	0.63
5	34.8	92.9	86.4	4.90	0.70
6	27.7	95.2	87.7	5.79	0.76
7	24.5	96.3	88.3	6.63	0.79
8	20.4	97.4	88.8	7.84	0.82
9	15.5	98.3	89.0	8.98	0.86
10	9.6	99.1	89.1	10.91	0.91
11	5.1	99.6	89.0	13.36	0.95
12	1.9	99.9	88.8	18.54	0.98
13	0.4	99.9	88.8	23.83	0.99
14+	0.0	100.0	88.8		1.00

IPVPI, Intimate partner violence during pregnancy instrument; LR+, Positive likelihood ratio; LR–, Negative likelihood ratio.