Table 3. Metabolism.

		3 weeks after surgery		2 weeks after surgery
	Parameter	LAPGB	GB	LAPDS	DS
Day	Energy expenditure (kcal/hr)	2.08±0.03	1.93±0.06	2.08±0.07	1.66±0.12**
	Energy expenditure (kcal/hr/100g body weight)	0.36±0.01	0.39±0.01	0.36±0.01	0.41±0.01**
	Energy expenditure (kcal/hr/cm2 body surface)	0.003±0.0001	0.004±0.0001	0.003±0.0001	0.004±0.0002
	RER	0.94±0.01	0.93±0.02	1.02±0.03	0.96±0.03
	VO2	726.68±15.56	779.91±23.26	705.18±18.00	823.91±31.49**
	VCO2	682.50±12.08	727.85±23.54	717.08±26.45	791.69±26.59
Night	Energy expenditure (kcal/hr)	1.75±0.14	1.85±0.10	2.45±0.08	1.66±0.10***
	Energy expenditure (kcal/hr/100g body weight)	0.30±0.02	0.37±0.02*	0.42±0.01	0.41±0.02
	Energy expenditure (kcal/hr/cm2 body surface)	0.003±0.0002	0.003±0.0002	0.004±0.0001	0.004±0.0002*
	RER	1.00±0.01	1.01±0.03	1.07±0.03	0.97±0.04
	VO2	600.02±36.70	737.88±43.20*	820.65±20.88	823.94±35.51
	VCO2	594.19±37.54	735.07±35.39*	877.73±35.71	803.06±49.36

Parameters during day- and night-time at 3 weeks after gastric bypass (GB) and the age-matched laparotomy-operated group (LAP_GB), and at 2 weeks after duodenal switch (DS) and the age-matched laparotomy-operated group (LAP_DS). Data are expressed as means ± SEM. *: p<0.05, **: p<0.01, ***: p<0.001 between LAP_GB vs. GB or LAP_DS vs. DS.