Table 3.

Predictive factors of a positive diagnosis via EGD in the univariate analysis.

	EGD Dx-positive patients (n = 34)	EGD Dx-negative patients (n = 21)	P value
Sex	22:12	13:8	1
Age	96.8 ± 66.2	89.2 ± 64.0	0.55
Height	112.2 ± 33.6	117.1 ± 33.3	0.762
Weight	25.5 ± 19.5	25.8 ± 15.8	0.972
Hb level	8.2 ± 2.6	10.9 ± 2.4	0.00048
Ht level	24.9 ± 7.0	33.3 ± 6.4	0.000164
BUN level	21.2 ± 14.4	11.6 ± 3.1	0.00238
Accompanying symptoms
Abdominal pain	16 (47%)	8 (38%)	0.584
Vomiting	19 (56%)	1 (4.8%)	0.00938
Bloody/tarry vomiting	9 (26%)	0 (0%)	0.00842
Fever	11 (32%)	1 (4.8%)	0.0194
Diarrhea	7 (21%)	2 (9.5%)	0.457
Underlying disease	20 (59%)	7 (33%)	0.0966
Positive findings on AUS	15 (26%; 58%)	2 (18%; 11%)	0.0209
Time to referral for EGD	0.73 ± 1.96	7.9 ± 13.5	0.0008
Low Hb level	−3.8 ± 2.8	−1.0 ± 2.6	0.000742
Low Hb level (≤ 3 g/dL than the lower normal limit)	24 (71%)	5 (24%)	0.00096

EGD, esophagogastroduodenoscopy; Dx, diagnosis; AUS, abdominal ultrasonography.