Protective effect of appendectomy against the onset of ulcerative colitis: A case-control study

Table 4 Comparison of onset age, scope of lesions, and degree of disease activity between male and female with ulcerative colitis, n (%)/mean ± SD

	Male (n = 176)	Female (n = 137)	t/χ2	P value
Onset age	42.46 ± 13.75	42.54 ± 14.24	-0.50	0.96
Scope of lesions			4.90	0.09
E1	17 (9.66)	25 (18.25)
E2	66 (37.50)	46 (33.57)
E3	93 (52.84)	66 (48.18)
Degree of disease activity			2.29	0.52
Clinical remission	6 (3.41)	2 (1.46)
Mild	29 (16.48)	29 (21.17)
Moderate	112 (63.64)	82 (59.85)
Severe	29 (16.48)	24 (17.52)