Table 1.

Multi-institutional Validation Study (table)

	Hospital 1			Hospital 2			Hospital 3			Total Mismatch
Variable	Number of Mismatches	Number of Patients	%	Number of Mismatches	Number of Patients	%	Number of Mismatches	Number of Patients	%	Overall Misclassification Rate
Treatment group	1	56	1.8%	0	47	0.0%	1	30	3.3%	1.5%
DOB	2	56	3.6%	1	47	2.1%	2	30	6.7%	3.8%
Race	6	56	10.7%	8	45	17.8%	6	30	20.0%	15.3%
Gestational agea	6	54	11.1%	2	19	10.5%	0	8	0.0%	9.9%
Premature	0	56	0.0%	0	46	0.0%	0	30	0.0%	0.0%
Birth Weightb	12	56	21.4%	6	25	24.0%	2	19	10.5%	20.0%
Gender	0	56	0.0%	0	47	0.0%	0	30	0.0%	0.0%
Congenital anomalies
Neurologic	0	56	0.0%	2	47	4.3%	1	30	3.3%	2.3%
Cardiac	3	56	5.4%	1	47	2.1%	1	30	3.3%	3.8%
Pulmonary	0	56	0.0%	0	47	0.0%	0	30	0.0%	0.0%
Renal	2	56	3.6%	1	47	2.1%	0	30	0.0%	2.3%
Chromosomal	0	56	0.0%	1	47	2.1%	1	30	3.3%	1.5%
Date of first surgeryc	14	56	25.0%	3	47	6.4%	2	30	6.7%	14.3%
Post-Op TPN	3	55	5.5%	33	39	84.6%	12	30	40.0%	38.7%
Diarrhea	28	55	50.9%	23	47	48.9%	10	30	33.3%	46.2%
Constipation	26	55	47.3%	20	47	42.6%	4	30	13.3%	37.9%
Enterocolitis	7	55	12.7%	5	47	10.6%	4	30	13.3%	12.1%
Incontinence	6	55	10.9%	0	47	0.0%	2	30	6.7%	6.1%
Anastomotic Leak	1	55	1.8%	6	47	12.8%	1	30	3.3%	6.1%
Stricture	9	55	16.4%	3	47	6.4%	3	30	10.0%	11.4%
Dilation	9	55	16.4%	6	47	12.8%	4	30	13.3%	14.4%
SBO	3	55	5.5%	5	47	10.6%	1	30	3.3%	6.8%
Redo pull-through	0	58	0.0%	0	47	0.0%	0	30	0.0%	0.0%
Reoperation	3	56	5.4%	4	47	8.5%	0	30	0.0%	5.3%

^a±1 week considered a match;

^b±100 g considered a match;

^c±1 days consider a match