Acute appendicitis: Epidemiology, treatment and outcomes- analysis of 16544 consecutive cases

Table 2 Surgical technique: Data about surgical techniques were available only after year 2000

	Open appendectomy	Laparoscopic appendectomy	Total	Univariate analysisP value	Multivariate analysis
					OR	P value
n (%)	6321 (52)	5734 (48)	12055
Age	22.79 (17.01)	27.57 (15.19)	25.06 (13.55)	< 0.0001	1.018 (1.018-1.0121)	< 0.0001
Sex	M: 61.5%	M: 50.2%	M: 54.6%	< 0.0001	1.80 (1.66-1.94)	< 0.0001
Charlson's	0.33 (0.97)	0.35 (0.87)	0.34 (0.92)	0.385
Year	0.277 (Pearson Correlation)			< 0.0001	1.15 (1.14-1.16)	< 0.0001
Time to surgery (d)	0.66 (1.35)	0.97 (1.53)	0.81 (1.45)	< 0.0001
Lenght of stay (d)	5.28 (3.00)	4.47 (2.66)	4.89 (2.85)	< 0.0001
Mortality	5 (0.1%)	1 (0.001%)	6 (< 0.0001)	0.13

Data are expressed as mean ± SD or number and proportion. Multivariate analysis was calculated for the correlation with laparoscopic approach.