Table 2.

Early and late major and minor complications following surgery up to one-year follow-up

Variable	SG N=376(73.3%)	RYGB N=137 (26.7%)	P value†
Length of hospital stay, day, mean ± SD (range)	2.8 ± 3.1 (2-18)	2.4 ± 2.6 (2-13)	0.333
Surgery time, min, mean ± SD	63.9 ±17.9	89.4±34.1	<0.001
Anesthesia time, min, mean ±SD	128.4 ±24.9	153.2 ±37.3	<0.001
Conversion to open, n (%)	1 (0.03)	0	NS
Major Complications, n (%)
Early (30-day)
Death	0	0	-
Return to operating room	8 (2.1%)	6 (4.3%)	NS
Port-site bleeding	4 (1%)	2 (1.4%)	NS
Abscess/Infection	3 (0.7%)	1 (0.7%)	NS
Anastomotic stricture	0	1 (0.7%)	NS
Staple line leak	1	0	NS
Marginal ulcer perforation	0	1 (0.7%)	NS
Internal hernia	0	1 (0.7%)	NS
Deep venous thrombosis	0	1 (0.7%)	NS
Pneumonia	1 (0.2%)	0	NS
Bleeding requiring transfusion	7 (1.8%)	4 (2.9%)	NS
Prolonged hospitalization (>7 d)	16 (4.2%)	6 (4.3%)	NS
Subtotal n (%)	16 (4.2%)	11(8.0%)	0.333
Late (>30 days up to one year)
Death††	2	0	NS
Symptomatic cholelithiasis /Cholecystectomy	5	1	NS
Nephrolithiasis	2	1	NS
Incisional hernia (diagnosed during follow-up)	2	0	NS
Subtotal, n (%)	11 (2.9%)	2 (1.5%)	0.064
T otal major complications, n (%)	27 (7.1%)	13 (9.5%)	0.458
Minor Complications
Dehydration requiring inpatient intravenous therapy	2	1	NS
Marginal ulcer diagnosed and treated with upper endoscopy	0	1	NS
Anastomotic stricture requiring endoscopic dilation	2	0	NS
Nausea and vomiting requiring intravenous fluids but not TPN	3	0	NS
Urinary tract infection managed with antibiotics	3	1	NS
Subtotal n (%)	10 (2.6%)	3 (2.2%)	NS

SG, sleeve gastrectomy; RYGB, Roux-en-Y gastric bypass; TPN, total parenteral nutrition;

^† For comparison between the two groups. Student t-test, Chi-squared or Fisher’s Exact tests were used based on variable type and the value of each cell,when appropriate.

^†† Two cases of advanced cancer diagnosed during follow-up.