Table 2. Serological measures of inflammation determined before and after RYGB with and without omentectomy.

Category	Before surgery		6 months post-op		12 months post-op		P value
Omentectomy	No	Yes	No	Yes	No	Yes	Group	G×T	Time
C-reactive protein (µg/mL)	11.0±9.1	9.3±11.0	2.4±1.4	3.2±3.6	2.8±3.8	1.0±0.5	0.716	0.983	<0.001
IL-1β (pg/ml)	2.9±4.6	18.6±38.5	2.2±1.2	6.2±10.5	1.9±1.4	16.2±34.5	0.194	0.119	0.06
IL-6 (pg/ml)	3.1±2.0	62.5±190.5	5.4±4.7	10.9±21.5	4.4±6.6	62.1±159.7	0.299	0.085	0.114
IL-8 (pg/ml)	3.7±2.1	18.6±45.4	3.3±1.4	8.5±9.0	3.8±1.7	19.6±38.8	0.265	0.246	0.263
IL-10 (pg/ml)	1.8±1.0	3.8±4.4	1.9±0.9	1.9±1.1	1.3±0.5	2.0±0.7	0.106	0.316	0.089
MCP-1 (pg/ml)	85.9±71.1	135.5±209.4	70.4±66.8	59.8±52.9	57.4±49.1	97.9±175.7	0.087	0.41	0.001
TNF-a (pg/ml)	1.8±1.7	12.1±23.3	1.8±1.0	4.7±7.4	1.2±0.6	9.4±15.7	0.123	0.18	0.119