Clinical and computed tomography findings of appendiceal diverticulitis vs acute appendicitis

Table 1 Comparison of the clinical features between appendiceal diverticulitis and acute appendicitis

Variable	Appendiceal diverticulitis (n = 44)		Acute appendicitis (n = 398)
	Median	Range	Median	Range	P value
Age (yr)	59	17-89	35	7-87	< 0.0012
Duration of symptoms (d)	4.0	10-30	1.0	0-20	< 0.0012
Preoperative CRP (mg/dL)	13.6	0.5-29.7	6.8	0.1-37.2	< 0.0012
Preoperative WBC (/μL)	13100	3580-20000	14000	2071-30100	0.022
	Number	Rate	Number	Rate
Sex (male/total)	32	72%	223	56%	0.061
Comorbidity (yes/total)	26	60%	278	70%	0.201

¹Fisher's exact test;

²Wilcoxon signed-rank test.

Table 2 Comparison of intra- and post-operative factor between appendiceal diverticulitis and acute appendicitis

Variable	Appendiceal diverticulitis (n = 44)		Acute appendicitis (n =398)
	Median	Range	Median	Range	P value
Operating times (min)	77	33-165	55	15-172	< 0.0012
Inoperative blood loss (mL)	60	10-970	20	10-650	< 0.0012
Postoperative hospital stay (d)	8	4-38	5	2-48	< 0.0012
	Number	Rate	Number	Rate
Ileocecal resection (yes/total)	6	13%	10	2%	0.0081
Skin incision (pararectal incision/total)	35	79%	143	36%	0.121
Formation of localized abscess (yes/total)	26	60%	60	15%	< 0.0011
Perforation (yes/total)	32	72%	123	31%	< 0.0011
Postoperative wound infection (yes/total)	7	15%	32	8%	0.121
Postoperative ileus (yes/total)	3	8%	16	4%	0.301

¹Fisher's exact test;

²Wilcoxon signed-rank test.

Table 3 Comparison of intra- and post-operative factor between perforated appendiceal diverticulitis and perforated acute appendicitis

Variable	Perforated appendiceal diverticulitis (n = 30)		Perforated acute appendicitis (n = 111)
	Median	Range	Median	Range	P value
Operating times (min)	65	45-165	67	25-172	0.982
Inoperative blood loss (mL)	60	10-970	40	10-650	0.052
Postoperative hospital stay (d)	9	5-38	9	3-48	0.772
	Number	Rate	Number	Rate
Ileocecal resection (yes/total)	4	13%	7	6%	0.201
Skin incision (pararectal incision/total)	27	89%	82	74%	0.111
Formation of localized abscess (yes/total)	22	72%	39	35%	< 0.0011
Postoperative wound infection (yes/total)	5	17%	19	17%	0.961
Postoperative ileus (yes/total)	3	11%	12	11%	0.921

¹Fisher's exact test;

²Wilcoxon signed-rank test.

Table 4 Results of the retrospective computed tomography review

Variable	Appendiceal diverticulitis (n = 25)		Acute appendicitis (n = 25)
	Median	Range	Median	Range	P value
Appendiceal diameter (mm)	13.2	4.3-23.4	12.4	8.1-18.9	0.252
Appendiceal wall thickening (mm)	3.1	1.6-5.3	3.7	2.0-6.2	0.772
	Number	Rate	Number	Rate
Visualized appendix (yes/total)	13	52%	25	100%	< 0.0011
Fluid collection in the appendix lumen (yes/total)	4	16%	22	88%	< 0.0011
Formation of localized abscess (yes/total)	17	68%	4	16%	< 0.0011
Periappendiceal fat stranding(yes/total)	16	66%	11	44%	0.171
Appendiceal or abscess wall enhancement (yes /total)	10	58%	9	41%	0.271
Apendicolith (yes/total)	2	8%	12	48%	0.00471
Visualized appendiceal diverticulum (yes /total)	6	24%	0	0%	0.0251

¹Fisher's exact test;

²Wilcoxon signed-rank test.