Value of color Doppler ultrasound in preoperative typing diagnosis of acute appendicitis

Table 4 Comparison of surgical approach and related indicators between two groups

Variable	Simple appendicitis (n = 186)	Suppurative appendicitis (n = 142)	Statistic	P value
Initial operative approach			χ2 = 64.35	< 0.001
Laparoscopic surgery	183 (98.4)	101 (71.1)
Open surgery	3 (1.6)	41 (28.9)
Conversion to open	3/183 (1.6)	22/101 (21.8)	χ2 = 27.85	< 0.001
Final operative approach			χ2 = 98.76	< 0.001
Completed laparoscopic surgery	180 (96.8)	79 (55.6)
Open or converted surgery	6 (3.2)	63 (44.4)
Operative time (minutes)	45.3 ± 12.8	68.5 ± 15.2	t = 14.26	< 0.001
Intra-operative blood loss (mL)	28.4 ± 12.3	52.8 ± 18.6	t = 12.87	< 0.001
Reasons for conversion			χ2 = 2.18	0.336
Dense adhesions	2 (66.7)	13 (59.1)
Unclear anatomy	1 (33.3)	6 (27.3)
Appendiceal abscess	0 (0)	3 (13.6)

Data was showed as n (%) or mean ± SD.