Prior Appendectomy and the Onset and Course of Crohn’s Disease in Chinese Patients

Table 5

Appendectomy versus no appendectomy in patients with CD.

	Previous appendectomy at or before 20 years ()		Previous appendectomy after 20 years ()		Total previous appendectomy patients ()		Nonprevious appendectomy patients ()
	Value		Value		Value		Value
Age of CD diagnosis (median and range, years)	26 (15-52)	0.378	41 (24-70)	0.011	33 (15-70)	0.372	29 (6-79)
Male sex	14	0.586	10	0.124	24	0.477	369
Disease duration (month)		0.823		0.494		0.441
Smokers	5	0.322	8	0.827	13	0.600	206
Location of the disease		0.672		0.539		0.378
L1	10		11		21		235
L2	2		2		4		86
L3	8		8		16		255
Behavior		0.452		0.545		0.691
B1	9		6		15		233
B2	6		11		17		246
B3	5		4		9		97
Bp	2	0.398	5	0.573	7	0.653	115
Corticosteroids	7	0.386	9	0.861	16	0.473	258
Immunosuppressants	3	0.031	8	0.942	11	0.124	224
Anti-TNF agents	4	0.824	6	0.222	10	0.313	104
Intestinal resection	3	0.483	6	0.442	9	0.949	124

Compared with nonprevious appendectomy patients.