Comparison of clinical and histopathological features of patients who underwent incidental or emergency appendectomy

Table 1 Comparison of demographics: Clinical and histopathological features of both groups

Parameters	Incidental App (n = 72)	Acute App (n = 288)	P value
Age			0.044a
mean ± SD	31.1 ± 11.3	37.1 ± 17.3
Median	28.5	32.0
Min-max	19.0-63.0	18.0-87.0
IQR	12.0	24.0
Gender			0.634b
Male	37 (51.4%)	157 (54.5%)
Female	35 (48.6%)	131 (45.5%)
WBC			< 0.001a
mean ± SD	7.8 ± 2.1	13.2 ± 4.5
Median	7.2	13
Min-max	4.5-15.4	1.1-23.8
IQR	2.4	6.6
Neutrophil			< 0.001a
mean ± SD	4.6 ± 2.0	11.0 ± 6.2
Median	4.2	11.1
Min-max	0.1-13.5	1.9-21.5
IQR	1.8	7.2
Lymphocyte			< 0.001a
mean ± SD	2.3 ± 0.6	1.8 ± 1.0
Median	2.3	1.7
Min-max	0.9-4.2	0.3-9.6
IQR	1.0	1.3
Platelets			0.954a
mean ± SD	248.0 ± 63.4	248.8 ± 84.2
Median	241.0	236.0
Min-max	103.0-461.0	43.0-641.0
IQR	73.0	90.0
RDW			0.036a
mean ± SD	13.4 ± 1.0	14.4 ± 7.2
Median	13.2	13.5
Min-max	11.8-18.0	11.4-28.8
IQR	1.1	1.4
MCH			< 0.001a
mean ± SD	29.8 ± 2.1	28.8 ± 3.1
Median	29.9	29.3
Min-max	20.0-33.0	19.3-46.9
IQR	2.4	2.4
MPV			0.441a
mean ± SD	8.4 ± 1.0	8.9 ± 1.8
Median	8.2	8.5
Min-max	6.3-11.6	5.4-12.4
IQR	1.1	1.7
MCV			0.078a
mean ± SD	86.8 ± 5.2	85.4 ± 6.9
Median	87.5	86.0
Min-max	60.4-95.5	30.5-96.5
IQR	6.2	6.7
PDW			0.286a
mean ± SD	16.1 ± 2.1	15.8 ± 2.1
Median	16.3	16.5
Min-max	11.3-18.3	8.9-19.2
IQR	0.6	1.0
Bilirubin			0.002a
mean ± SD	0.7 ± 0.3	0.9 ± 0.6
Median	0.6	0.7
Min-max	0.1-2.1	0.1-6.0
IQR	0.4	0.6
Appendix width (mm)			< 0.001a
mean ± SD	6.4 ± 1.8	10.9 ± 6.6
Median	6.0	10.0
Min-max	4.0-13.0	1.5-40.0
IQR	2.0	7.0
Appendix length (mm)			0.096a
mean ± SD	70.3 ± 18.8	66.5 ± 19.9
Median	70.0	65.0
Min-max	30.0-110.0	10.0-155.0
IQR	21.0	25.0
Acute appendicitis			< 0.001b
Yes	5 (6.9%)	238 (82.6%)
No	67 (93.1%)	50 (17.4%)
Histopathological findings
Acute App	5 (6.9%)	181 (62.8%)
Perforated App	0 (0.0%)	48 (16.7%)
Appendix vermiformis	52 (72.2%)	18 (6.3%)
Lymphoid hyperplasia	3 (4.2%)	18 (6.3%)
Granulomatous App	0 (0.0%)	3 (1.0%)
E. vermicularis	3 (4.2%)	1 (0.3%)
F. obliteration	7 (9.7%)	8 (2.8%)
Mucinous cystadenoma	1 (1.4%)	5 (1.7%)
Acute App + E. vermicularis	0 (0.0%)	1 (0.3%)
Acute App + diverticulitis	0 (0.0%)	1 (0.3%)
Acute App + F. obliteration	0 (0.0%)	3 (1.0%)
Acute App + eosinophilic infiltration	0 (0.0%)	1 (0.3%)
Low grade mucinous neoplasm	1 (1.4%)	0 (0.0%)

^aMann Whitney U.

^bPearson Chi-square.

IQR: Interquartile range; Min: Minimum; Max: Maximum; SD: Standard deviation; Acute App: Acute appendicitis; E. vermicularis: Enterobius vermicularis; F. obliteration: Fibrous obliteration; WBC: White blood cell; MCH: Mean corpuscular hemoglobin; RDW: Red cell distribution width; MPV: Mean platelet volume; MCV: Mean corpuscular volume; PDW: Platelet distribution width.