Table 2.

Bivariate analysis comparing operative factors and morbidity and mortality in obese and non-obese patients.

Factor	Normal N=8,622	Overweight N=9,202	Class I Obesity N=5,247	Class II Obesity N=2,134	Class III Obesity N=1,232	p-value
Procedure type						<0.0001
Open	5,405 (62.7%)	5,620 (61.1%)	3,239 (61.7%)	1,423 (66.7%)	853 (69.2%)
Laparoscopic	3,217 (37.3%)	3,582 (38.9%)	2,008 (38.3%)	711 (33.3%)	379 (30.8%)
Wound classification						NS
Clean	19 (0.2%)	18 (0.2%)	16 (0.3%)	4 (0.2%)	7 (0.65%)
Clean contaminated	7,150 (82.9%)	7,605 (82.6%)	4,315 (82.2%)	1,735 (81.3%)	1,006 (81.67%)
Contaminated	1,026 (11.9%)	1,105 (12.0%)	650 (12.4%)	291 (13.6%)	144 (11.7%)
Dirty/Infected	427 (5.0%)	474 (5.2%)	266 (5.1%)	104 (4.9%)	75 (6.1%)
Anastomosis w/o stoma (yes)	5,118 (59.4%)	5,938 (64.5%)	3,513 (67.0%)	1,473 (69.0%)	836 (67.9%)	<0.0001
Operative time (mean; min)	203.3 ± 98.5	211.9 ± 101.7	218.0 ± 103.7	225.3 ± 106	234.3 ± 109.2	<0.0001
Any complication	1,848 (21.4%)	2,003 (21.8%)	1,331 (25.4%)	616 (28.9%)	423 (34.3%)	<0.0001
Specific Complications
Superficial wound infections	708 (8.2%)	986 (10.7%)	691 (13.2%)	367 (17.2%)	279 (22.7%)	<0.0001
Deep organ Space Infections	429 (5.0%)	433 (4.7%)	248 (4.7%)	99 (4.6%)	71 (5.8%)	NS
Pulmonary	280 (3.3%)	250 (2.7%)	167 (3.2%)	78 (3.7%)	44 (3.6%)	NS
Acute renal failure	32 (0.4%)	59 (0.6%)	27 (0.5%)	14 (0.7%)	13 (1.1%)	0.01
Thromboembolic	126 (1.5%)	108 (1.2%)	97 (1.9%)	41 (1.9%)	22 (1.8%)	0.006
Sepsis/Septic shock	461 (5.4%)	501 (5.4%)	317 (6.0%)	150 (7.0%)	100 (8.1%)	0.0001
Transfusion	355 (4.1%)	292 (3.2%)	196 (3.7%)	96 (4.5%)	47 (3.8%)	0.005
Return to the OR	486 (5.6%)	472 (5.1%)	298 (5.7%)	137 (6.4%)	85 (6.9%)	0.03
Length of stay (mean; days)	7.8 ± 7.0	7.6 ± 6.5	7.5 ± 5.8	7.9 ± 7.7	8.6 ± 8.8	<0.0001
30-day mortality	76 (0.9%)	51 (0.6%)	32 (0.6%)	12 (0.6%)	9 (0.7%)	NS