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

Table 3

Appendectomy before CD diagnosis is stratified by CD location and behavior.

	Patients	Appendectomy (%)	Control (%)
Location
L1	256	21 (8.20%)	11 (4.30%)	0.099
L2	90	4 (4.44%)	3 (3.33%)	1.000
L3	271	16 (5.90%)	9 (3.32%)	0.230
Behavior
B1	248	15 (6.05%)	8 (3.23%)	0.210
B2	263	17 (6.46%)	10 (3.80%)	0.248
B3	106	9 (8.49%)	5 (4.72%)	0.424
Bp	122	7 (5.74%)	5 (4.10%)	0.774
Total	617	41 (6.65%)	23 (3.73%)	0.033

Pairwise-matched analyses.