Table 1.

Percentage of ‘olives’ palpated

Author	Yeara	Cases b	Proportion IHPS	Sensitivity (95% CI)	Specificity (95% CI)
Cremin 9	1956–1967	165	1.0	0.84 [0.77–0.89]	n/e
Macdessi 10	1974–1977 and 1988–1991	402	1.0	0.90 [0.86–0.92]	n/e
Breaux 11	1980–1984	363	1.0	0.85 [0.80–0.88]	n/e
dell'Agnola 12	1981–1982	17	0.82	0.15 [0.02–0.45]	1.00 [0.29–1.00]
Mollitt 13	1983–1986	101	0.57	0.47 [0.33–0.60]	0.98 [0.88–1.00]
Forman 14	1985–1988	101	0.77	0.77 [0.66–0.86]	1.00 [0.29–1.00]
Rollins 15	1986–1988	100	0.44	0.86 [0.73–0.95]	n/e
De Backer 16	1986–1991	63	1.0	0.60 [0.47–0.72]	n/e
Muramori 17	1986–1996	103	1.0	0.79 [0.69–0.86]	n/e
Shaoul 18	1990–2000	70	1.0	0.50 [0.38–0.62]	n/e
Ozsvath 19	1991–1995	60	1.0	0.33 [0.22/0.47	n/e
Godbole 20	1993–1995	116	0.65	0.80 [0.69–0.88]	0.98 [0.87–1.00]
White 21	1994–1996	234	0.64	0.74 [0.66–0.81]	0.99 [0.94–1.00]
Gotley 22	1994–2004	329	1.0	0.44 [0.39–0.50]	n/e
Frkovic 23	1995–1999	14	1.0	0.15 [0.02–0.45]	n/e
Bakal 24	1996–2015	56	1.0	0.54 [0.40–0.67]	n/e
Helton 25	2000–2002	175	1.0	0.32 [0.25–0.39]	n/e
Mullassery 26	2000–2004	343	1.0	0.94 [0.89–0.96]	0.00 [0.00–0.97]
Leaphart 27	2001–2006	314	1.0	0.63 [0.57–0.68]	n/e
Khatami 28	2001–2008	84	1.0	0.15 [0.09–0.25]	n/e
Glatstein 29	2006–2008	118	1.0	0.13 [0.07/0.20]	n/e
Malcolm 30	n/a (published in 2009)	8	1.0	0.25 [0.03–0.65]	n/e
Sivitz 31	2009–2012	67	0.15	0.10 [0.00–0.45]	n/e

IHPS, Infantile hypertrophic pyloric stenosis.

^aRange of data collection

^bTotal number of cases included in the study. n/e means not estimable, 95% CI means 95% confidence interval