Selected nasogastric lavage in patients with nonvariceal upper gastrointestinal bleeding

BMC Gastroenterology

Table 4 Subgroup analysis of model comparisons for the prediction of the presence of a bleeding focus on endoscopy

Variables	cNRI	95 % CI	P value	IDI	95 % CI	P value
GBS ≤ 7 (N = 167)
GBS	Reference			Reference
GBS + BUN/Cr	0.422	0.158–0.685	0.002	0.027	0.002–0.052	0.032
GBS + NGL	0.602	0.315–0.889	< 0.001	0.101	0.056–0.146	< 0.001
GBS + NGL + BUN/Cr	0.559	0.268–0.850	< 0.001	0.128	0.077–0.180	< 0.001
7 < GBS ≤ 11 (N = 153)
GBS	Reference			Reference
GBS + BUN/Cr	0.504	0.149–0.860	0.005	0.043	0.012–0.075	< 0.001
GBS + NGL	0.666	0.329–1.003	< 0.001	0.103	0.065–0.141	< 0.001
GBS + NGL + BUN/Cr	0.676	0.376–0.975	< 0.001	0.134	0.086–0.181	< 0.001
GBS > 11 (N = 167)
GBS	Reference			Reference
GBS + BUN/Cr	0.401	0.035–0.766	0.032	0.032	0.002–0.062	0.039
GBS + NGL	0.175	-0.187–0.537	0.343	0.005	-0.007–0.017	0.379
GBS + NGL + BUN/Cr	0.432	0.062–0.801	0.022	0.034	0.003–0.065	0.031

BUN/Cr blood urea nitrogen/creatinine ratio > 30 versus ≤ 30, CI confidence interval, cNRI category-free net reclassification improvement, GBS Glasgow–Blatchford score, IDI integrated discrimination improvement, NGL nasogastric lavage

ISSN: 1471-230X