Effects of Appendectomy on the Onset and Course of Ulcerative Colitis in Chinese Patients

Table 4

Appendectomy vs no appendectomy in patients with UC.

	Appendectomy before UC diagnosis ()	No appendectomy ()
Age at UC diagnosis (years)	48.64 ± 5.39 (39–56)	41.72 ± 15.70 (16–81)	0.002
Median and range of disease duration (years)	5.66 ± 3.12	6.04 ± 5.08	0.807
Smokers (%)	2 (18.18%)	79 (20.20%)	0.869
Severity of disease			0.444
Mild (%)	5 (45.45%)	126 (32.23%)
Moderate (%)	5 (45.45%)	231 (59.08%)
Severe (%)	1 (9.09%)	34 (8.70%)
Location of disease			0.009
Proctitis (%)	4 (36.36%)	36 (9.21%)
Left-sided colitis (%)	5 (45.45%)	165 (42.20%)
Extensive colitis (%)	2 (18.18%)	190 (48.59%)
Immunosuppressant (%)	3 (27.27%)	192 (49.10%)	0.153
Colectomy	0	28 (7.16%)	1.000