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

Table 2

The distribution of UC patients with varying age at appendectomy and interval between appendectomy and diagnosis of UC.

		Interval between appendectomy and UC diagnosis (years)
		0-1	2–5	> 5
Age at appendectomy (years) in UC	≤20	0	0	1
	> 20	0	1	9
Age at appendectomy (years) in controls	≤20	0	1	4
	> 20	1	2	8