Inter- and intraobserver agreement in computed tomography enterography in inflammatory bowel disease

Table 1 Patient characteristics (n = 44) n (%)

Variable	Value
Sex
Male	19 (43.2)
Female	25 (56.8)
Age at CTE (yr)	49.0 ± 25.4
IBD
Crohn’s disease	38 (86.3)
Ulcerative colitis	6 (13.7)
Fecal calprotectin
Minimum	30
Maximum	1800
Mean ± SD	496 ± 706
> 250 μg/g (%)	30 (68.2)

CTE: Computed tomography enterography; IBD: Inflammatory bowel disease.

Table 2 Interobserver agreement in computed tomography enterography (n = 44)

CTE variables	Reader 2						%1	κ value	P value
Disease localization
Reader 1	SB	C	B	ND	Total		65.9	0.54	< 0.001
SB	10	0	8	0	18
C	0	3	0	1	4
B	0	0	9	0	9
ND	2	4	0	7	13
Total	12	7	17	8	44
Type of IBD
Reader 1	I	S	F	M	N	Total	54.5	0.41	< 0.001
I	9	1	0	2	1	13
S	1	6	0	1	0	8
F	0	0	1	2	0	3
M	2	2	1	2	0	7
N	5	0	2	0	6	13
Total	17	9	4	7	7	44
Signs of active disease
Reader 1	Present		Absent		Total		70.4	0.419	0.002
Present	19		2		21
Absent	11		12		23
Total	30		14		44

¹Percentage of agreement. B: Both; C: Colon; CTE: Computed tomography enterography; F: Fistulizing; I: Inflammatory; IBD: Inflammatory bowel disease; M: More than one pattern; N: Normal; ND: No disease detected; S: Stenosing; SB: Small bowel.

Table 3 Intraobserver agreement in computed tomography enterography (n = 42)

CTE variables	Reader 2 (2nd)						%1	κ value	P value
Disease localization
Reader 2 (RE)	SB	C	M	ND	Total		92.8	0.902	< 0.001
SB	12	0	3	0	15
C	0	7	0	0	7
B	0	0	12	0	12
ND	0	0	0	8	8
Total	12	7	15	8	42
Type of IBD (n = 44)
Reader 2 (RE)	I	S	F	M	N	Total	95.1	0.937	< 0.001
I	15	0	0	0	0	15
S	0	8	0	0	0	8
F	0	0	3	0	0	3
M	2	0	0	6	0	8
N	0	0	0	0	8	8
Total	17	8	3	6	8	42
Signs of active disease
Reader 2 (RE)	Present		Absent		Total		92.9	0.83	< 0.001
Present	28		3		31
Absent	0		11		11
Total	28		14		42

¹Percentage of agreement. 2^nd: Second evaluation; SB: Small bowel; B: Both; C: Colon; CTE: Computed tomography enterography; F: Fistulizing; I: Inflammatory; IBD: Inflammatory bowel disease; M: More than one pattern; N: Normal; ND: No disease detected; RE: Routine evaluation; S: Stenosing.