Implications of small-bowel transit time in the detection rate of capsule endoscopy: A multivariable multicenter study of patients with obscure gastrointestinal bleeding

Table 1 Classification of the findings of small-bowel capsule endoscopy

P0-1 Group	P2 Group
Normal	AVM
Lymphangectasia	Hemangioma
Small isolated phlebectasia	Mass
Lymphatic cyst	Erosion(s)
Isolated tiny red spots	Ulcer(s)
	Blood

AVM: Artero-venous malformations.

Table 2 Comparison between groups with significant (P2) and normal/negligible (P0-1) findings of small bowel capsule endoscopy in patients with obscure gastrointestinal bleeding

	P2 group	P0-1 group	P value
n (%)	776 (54)	657 (46)
Age (yr), mean ± SD	69 ± 13	64 ± 16	< 0.0001
Male gender (%)	59.0	54.5	0.09
SBTT (min), mean ± SD	283 ± 105	269 ± 98	0.0015
Pillcam SB (%)	86.3	85.3	0.61
Outpatients (%)	56.6	61	0.1
Center’s volume (%), low/mid/high	7/33/60	3/27/70	< 0.001
Adequate cleanliness (%)	97	95	0.06

SBTT: Small-bowel transit time.

Table 3 Product-moment correlation matrix in the final model of multiple stepwise regression

Variables	Center’s volume	Age	SBTT	P0-1/P2 lesion
Center’s volume	1.000	0.006	0.009	0.112
Age	0.006	1.000	0.112	0.160
SBTT	0.009	0.112	1.000	0.064
P0-1/P2 lesion	0.112	0.160	0.064	1.000

P0-1/P2 lesion is the dependent variable. SBTT: Small-bowel transit time.