Effect of longer battery life on small bowel capsule endoscopy

Table 1 Exclusions

Other capsule endoscopy system	140
History of gastrointestinal surgery proximal to ileocecal valve	101
Endoscopic placement	7
Repeat procedure with same system	6
Aborted procedure due to inability to swallow	2
Technical difficulty with data transmission gap	3
Debris obscuring identification of landmarks	2

Table 2 Basic Information n (%)

Variable	All (n = 408)	SB2 (n = 186)	SB2U (n = 222)	P value
Male	208 (51.0)	93 (50.0)	115 (51.8)	0.717
Age				0.602
Mean ± SD	55.5 ± 19.3	56.6 ± 17.3	54.6 ± 20.9
Median (IQR)	60.0 (44.0, 70.0)	59.5 (47.0, 69.0)	60.0 (41.0, 70.0)
Range	(9.0, 90.0)	(15.0, 90.0)	(9.0, 88.0)
Indication				0.051
Gastrointestinal bleeding	254 (62.3)	121 (65.1)	133 (59.9)
Inflammatory bowel disease	86 (21.1)	29 (15.6)	57 (25.7)
Abdominal pain, radiological abnormality, history of obstruction	47 (11.5)	23 (12.4)	24 (10.8)
Others1	21 (5.1)	13 (7.0)	8 (3.6)
Inpatient	20 (4.9)	8 (4.3)	12 (5.4)	0.607
Previous abdominal/pelvic surgery	171 (41.9)	83 (44.6)	88 (39.6)	0.310
Use of narcotics or prokinetics				0.641
None	371 (90.9)	168 (90.3)	203 (91.4)
Narcotics	33 (8.1)	17 (9.1)	16 (7.2)
Prokinetics	4 (1.0)	1 (0.5)	3 (1.4)
Bowel habit				0.848
Normal	342 (83.8)	154 (82.8)	188 (84.7)
Constipation	14 (3.4)	8 (4.3)	6 (2.7)
Diarrhea	41 (10.0)	19 (10.2)	22 (9.9)
Alternating	11 (2.7)	5 (2.7)	6 (2.7)
Connective tissue disease	16 (3.9)	9 (4.8)	7 (3.2)	0.382
Diabetes mellitus	73 (17.9)	28 (15.1)	45 (20.3)	0.171
Charlson index score (unadjusted for age)				0.819
Mean ± SD	1.0 ± 1.6	1.0 ± 1.5	1.1 ± 1.7
Median (IQR)	0.0 (0.0, 2.0)	0.0 (0.0, 2.0)	0.0 (0.0, 2.0)
Range	(0.0, 10.0)	(0.0, 7.0)	(0.0, 10.0)

¹Polyposis syndrome, cancer/lymphoma screening/surveillance, abnormal bowel movement, reflux, pancytopenia, refractory celiac disease, recurrent vomiting. IQR: Interquartile range; SD: Standard deviation.

Table 3 Unadjusted analysis

Variable	All(n = 408)	SB2(n = 186)	SB2U(n = 222)	P value
GTT, minutes				0.794
Mean ± SD	35.4 ± 44.5	35.0 ± 41.5	35.7 ± 47.0
Median (IQR)	19.5 (10.7, 41.9)	19.5 (10.6, 42.7)	19.5 (10.9, 41.8)
Range	(0.1, 417.2)	(0.1, 262.8)	(0.4, 417.2)
SBTT, hours				0.669
Mean ± SD	4.1 ± 2.2	3.9 ± 1.6	4.3 ± 2.6
Median (IQR)	3.9 (2.7, 4.8)	3.9 (2.8, 4.5)	3.9 (2.5, 4.9)
Range	(0.3, 14.5)	(0.3, 7.8)	(0.5, 14.5)
Total recorded time, h				< 0.001
Mean ± SD	8.4 ± 1.8	7.7 ± 0.5	9.0 ± 2.2
Median (IQR)	7.9 (7.9, 8.2)	7.9 (7.8, 7.9)	8.2 (8.0, 8.6)
Range	(3.6, 16.1)	(3.8, 8.0)	(3.6, 16.1)
Completion				0.076
No	37 (9.1)	22 (11.8)	15 (6.8)
Yes	371 (90.9)	164 (88.2)	207 (93.2)
Result				0.905
Negative	279 (68.7)	127 (69.0)	152 (68.5)
Positive	127 (31.3)	57 (31.0)	70 (31.5)

IQR: Interquartile range; GTT: Gastric transit time; SBTT: Small bowel transit time; SD: Standard deviation.

Table 4 Adjusted analyses

Variable	Group difference (95%CI)	P value
GTT	0.90 (0.72-1.13)	0.352
SBTT	1.07 (0.95-1.19)	0.261
Total recorded time	1.14 (1.10-1.18)	< 0.001
	Odds ratio (95%CI)
Completion	1.78 (0.88-3.63)	0.111
Positive findings	0.98 (0.64-1.51)	0.918

GTT: Gastric transit time; SBTT: Small bowel transit time.