Table 2.

Anthropometric and energetic at baseline and 6 and 24 months post bariatric surgery.

	Baseline		6 months post-surgery		24 months post-surgery		P (0 vs 6 months)	P (6 vs 24 month)
	Mean	SD	Mean	SD	Mean	SD
Age (14 women: 2 men) years	46.3	± 11.2
Body Mass Index (Kg/m2)	47.8	± 5.2	37.3	± 4.4	31.7	± 9.2	<0.0001	0.03
Weight (kg)	134.5	± 13.0	104.2	± 9.9	96.7	± 12.3	<0.0001	0.005
Body fat (%)	47.0	± 6.4	39.7	± 7.5	37.6	± 6.1	<0.0001	0.05
Body fat (kg)	63.7	± 13.4	41.7	± 10.4	36.7	± 9.2	<0.0001	0.01
Fat free mass (kg)	70.8	± 7.0	62.5	± 6.9	60.0	± 7.2	<0.0001	0.02
Total body water (kg)	46.2	± 4.9	41.7	± 5.0	40.6	± 4.8	<0.0001	ns
RMR (kcal/day)	1792	± 267	1460	± 192	1563	± 216	<0.0001	ns
RMR Residual (kcal/day)	13.3	± 196	161	+ 139	3.0	± 141	=0.02	ns
TDEE (kcal/day)	2957	± 540	2423	± 324	2602	± 471	0.0003	ns
TDEE Residual (kcal/day)	47.3	± 410	273	± 377	94	± 550	ns	ns

Anthropometric and energetic data for 16 subjects (14 women, 2 men) at baseline and 6 months and 24 months after bariatric surgery. Body composition was determined using dual-X-ray absorptiometry (DXA), and total body water was derived from deuterium dilution. RMR, basal metabolic rate; FFM, fat-free mass; TDEE, total daily energy expenditure. RMR was determined by indirect calorimeters and TDEE using doubly labeled water. Data are shown as mean ± standard deviation (SD). P values are for paired analyses. Residuals were calculated by predicting RMR and TDEE based upon the respective baseline relationships with FFM. The residuals were calculated as Predicted – Actual. The equation that described the baseline relationship between FFM and RMR was: RMR = 22.1 * FFM + 243 (R² = 0.55, P<0.001). The equation that described the baseline relationship between FFM and TDEE was: TDEE = 37.0 * FFM + 382 (R² = 0.40, P<0.001).