Laparoscopic treatment of perforated appendicitis

Table 4 Summary of 2 population-bases studies for obese patients with perforated appendicitis

Study	Varela et al[80]	Masoomi et al[6]
Study period	2002-2007	2006-2008
Data source	UHCD	NISD
Patient numbers	LA: 238, OA: 441	LA: 6769, OA: 7110
Definition of obesity	BMI ≥ 40 kg/m2	BMI ≥ 30 kg/m2
Length of hospital stay, d	LA: 5, OA: 7b	LA: 4.4, OA: 6.5b
Mortality	LA: 0%, OA: 0%	LA: 0%, OA: 0.50%b
Overall complication rate	LA: 18%, OA: 27%b	LA: 22.34%, OA: 34.65%b
Mean costs, USD	LA: 12300, OA: 16600b	LA: 36483, OA: 43901b

^bP < 0.01 vs perforated appendicitis (OA) group. NISD: Nationwide Inpatient Sample Database; UHCD: University Health System Consortium Database; LA: Laparoscopic appendectomy; BMI: Body mass index.