Risk factors for rebleeding after angiographically negative acute gastrointestinal bleeding

Table 1 Prediction of rebleeding in patients with angiographically negative gastrointestinal bleeding

Variable		Rebleeding		P value at univariate analysis	Multiple logistic regression
		Absent	Present		P value	OR	CI
Age (yr)		59.2 ± 15.1	56.9 ± 15.9	0.414
Hemoglobin (g/dL)		8.2 ± 1.9	7.3 ± 1.9	0.009
Platelet (× 1000/mm)		173.5 ± 98	151 ± 140	0.301
PT (INR)		1.25 ± 0.31	1.38 ± 0.66	0.063
aPTT (s)		38.7 ± 9.9	48.6 ± 31.8	0.027
Sex	Female	17	18	1.000
	Male	45	48
NSAID	No use	59	64	0.673
	Use	3	2
Anticoagulation	No	56	64	0.155
	Yes	6	2
Antiplatelet therapy	No	47	61	0.014
	Yes	15	5
Malignancy	Absent	42	26	0.002	0.002	3.81	1.63-8.91
	Present	20	40
GI tumor bleeding	Absent	57	56	0.275
	Present	5	10
Recent surgery	Absent	44	41	0.350
	Present	18	25
Recent GI surgery	Absent	54	52	0.247
	Present	8	14
Past GI bleeding history	Absent	47	51	1.000
	Present	15	15
Chronic renal failure	Absent	54	58	1.000
	Present	8	8
Liver cirrhosis	Absent	56	47	0.007	0.017	4.81	1.32-17.54
	Present	6	19
Hematemesis	Absent	46	38	0.063	0.042	2.59	1.04-6.07
	Present	16	28
Hematochezia	Absent	32	34	1.000
	Present	30	32
Melena	Absent	40	43	1.000
	Present	22	23
Shock	Absent	37	24	0.013
	Present	25	42

PT: Prothrombin time; aPTT: Activated partial thromboplastin time; NSAID: Non-steroidal anti-inflammatory drug.