Table 2.

Body weight, body composition and thermogenic changes in the RYGB, AGB and Diet groups at 14 days (Visit 2).

	RYGB (n=12)	AGB (n=8)	Diet only (n=10)	p value
Weight (kg), V1	138.0±21.6	120.5±17.5	134.7±16.9
Weight (kg), V2	128.1±19.8	113.4±18.0	126.5±15.6
ΔWeight (kg) V1–2	−9.9±2.4	−7.1±1.9	−8.2±2.3	0.03
p value	<0.01	<0.01	<0.01
%EWL V1–2	12.7±2.4	12.0±4.3	10.9±2.8	0.38
Fat* (kg), V1	59.8±5.7	57.8±13.2	61.2±8.6
Fat* (kg), V2	57.0±5.9	55.3±13.7	59.1±9.1
ΔFat (kg) V1–V2	−2.8±1.2	−2.5±1.0	−2.0±1.2	0.42
p value	<0.01	<0.01	<0.01
% Fat*, V1	48.6±6.8	48.1±5.4	46.8±4.7
% Fat*, V2	49.0±7.0	48.3±5.3	47.3±5.2
Δ% Fat V1–2*	0.47±0.95	0.27±1.01	0.56±0.76	0.80
p value	0.2	0.51	0.04
LBM* (kg), V1	61.9±15.4	59.0±7.6	67.2±11.5
LBM* (kg), V2	57.7±14.4	55.4±6.5	63.4±11.2
ΔLBM (kg) V1–V2	−4.2±1.5	−3.6±2.3	−3.9±0.8	0.80
p value	<0.01	<0.01	<0.01
% LBM*, V1	49.2±6.7	49.6±5.1	51.1±4.5
% LBM*, V2	48.6±6.9	49.1±4.9	50.4±5.0
Δ% LBM V1–2*	−0.59±0.94	−0.48±1.04	−0.63±0.76	0.94
p value	0.12	0.27	0.03
REE, V1	2145±338	1831±165	2091±363
REE, V2	2024±252	1678±231	1985±288
ΔREE V1–2	−121±196	−153±119	−107±205	0.88
p value	0.08	0.02	0.19
Wt-REE, V1	15.1±1.2	15.2±1.9	15.8±1.3
Wt-REE, V2	15.3±1.4	14.6±1.5	15.8±1.0
ΔWt-REE V1–2	0.22±1.23	−0.61±1.10	0.03±1.27	0.37
p value	0.58	0.19	0.95
LBM-REE, V1	31.4±4.0	31.8±4.5	32.7±2.1
LBM-REE, V2	32.6±5.0	31.3±2.9	33.2±3.2
ΔLBM-REE V1–2	1.24±1.89	−0.45±2.67	0.47±3.0	0.55
p value	0.17	0.7	0.67

RYGB = Roux-en-Y gastric bypass; AGB = adjustable gastric banding; EWL = excess weight loss; LBM = lean body mass; REE = resting energy expenditure, kcal/d; V1 = Visit 1 (baseline); V2 = Visit 2 (14 days); Wt-REE = weight adjusted REE, kcal/kg/d; LBM-REE = LBM adjusted REE, kcal/kg LBM/d;

^*fat and LBM by DXA (dual-energy X-ray absorptiometry);