. 2015 Dec 3;89(1057):20150536. doi: 10.1259/bjr.20150536

Table 4.

Quantitative analysis

MRI features	Prevalence		Sensitivity	Specificity	Accuracy	PPV	NPV	K
Size > 7 cm	MCAs	11/43	82	74	77	62	89	0.522
Size > 7 cm	MCACs	18/22	82	74	77	62	89	0.522
Septa > 3 mm	MCAs	6/43	91	86	88	77	95	0.737
Septa > 3 mm	MCACs	20/22	91	86	88	77	95	0.737
Wall > 3 mm	MCAs	8/43	86	81	83	70	92	0.642
Wall > 3 mm	MCACs	19/22	86	81	83	70	92	0.642
Number of cysts > 4	MCAs	8/43	77	81	80	68	87	0.568
Number of cysts > 4	MCACs	17/22	77	81	80	68	87	0.568

k, κ-Cohen; MCAs, mucinous cystoadenomas; MCACs, mucinous borderline tumours and cystoadenocarcinomas; NPV, negative-predictive value; PPV, positive-predictive value.

The table shows the prevalence in each group (MCAs and MCACs) of quantitative variables at their best cut-off values: size >7 cm, septa thickness >3 mm, wall thickness >3 mm and number of cysts >4, with respective sensitivity, specificity, accuracy, PPV and NPV and agreement on malignancy (k) calculated by the κ-Cohen test.