Table 2.

Sensitivity and specificity of ultrasonography in the diagnosis of infantile hypertrophic pyloric stenosis based on PMT ≥ 3 mm and PMT ≥ 4 mm

Author	Yeara	Casesb	Proportion IHPS	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
O'Keeffe 32	1991	145	0.29	95.2	100	100	98.1	98.6
Hernanz-Schulman 33	1994	150	0.44	100	100	100	100	100
Hallam 34	1995	47	0.45	81	92.3	89.5	85.7	87.2
Rohrschneider 35	1998	169	0.5	100	100	100	100	100
Lowe 36	1999	84	0.41	100	100	n/e	n/e	n/e
Forster 37	2007	187	0.47	91.9	85.1	n/e	n/e	n/e
Alehossein 38	2009	444	0.17	100	100	100	100	100
Malcom 30	2009	8	1	100	n/e	n/e	n/e	n/e
Iqbal 39	2012	304	0.22	95.5	99.2	97	99.7	98.4
Vinycomb 51	2021	284	0.5	97.8	94	94.6	97.7	96
Tunell 40	1984	91	0.44	92.5	90.2	88.1	93.9	91.2
Wilson 41	1984	50	0.58	93.1	90.5	93.1	90.5	92
Cohen 42	1987	156	0.08	100	n/e	n/e	n/e	n/e
Westra 43	1989	47	0.47	95.5	100	100	96.2	97.2
Ito 44 44	2000	57	1	93	n/e	n/e	n/e	n/e
Mullassery 26 26	2008	343	99.1	95.2	0	99.1	0	94.4
Alehossein 38 38	2009	444	0.17	96	100	100	99.2	99.3

IHPS, infantile hypertrophic pyloric stenosis; NPV, negative-predictive value;PMT, pyloric muscle thickness; PPV, positive-predictive value.

^aYear published

^bTotal number of cases included in the study. N/e means not estimable, because there was lack of sufficient data to calculate value and/or value was not reported in publication.