Table 1.

Unadjusted Body Composition Means by Surgery Type and Sex

		Females						Males
		RYGB		SLEEVE		BAND		RYGB
Variable	Time	N	Mean±SD	N	Mean±SD	N	Mean±SD	N	Mean±SD
Weight (kg)	T0	58	123.1±18.9	11	145.7±28.1	10	116.1±18.2	14	143.8±17.2
	T1	55	79.8±16.3	9	104.3±25.2	9	102.1±21.3	14	98.8±17.8
	T2	48	80.0±18.0	10	107.6±24.3	10	100.3±21.3	11	101.0±18.9
	T5	34	83.3±21.8	8	108.4±17.7	9	99.2±16.7	7	101.9±11.8
TBW (kg)	T0	57	44.0±7.0	11	46.9±6.6	10	40.6±5.7	14	56.6±11.1
	T1	55	37.9±6.0	8	41.5±5.9	9	37.7±6.3	14	51.9±6.5
	T2	46	37.1±5.6	9	41.7±5.4	9	38.9±4.6	9	52.5±4.7
	T5	34	36.7±6.3	8	40.8±6.2	9	38.3±6.7	7	52.3±6.9
3C FFM (kg)	T0	56	57.6±8.4	10	59.5±7.4	10	53.5±7.4	14	74.9±9.3
	T1	55	50.4±7.1	9	54.3±7.2	9	50.3±7.9	14	69.6±6.8
	T2	46	49.4±7.1	9	54.4±6.7	10	51.6±5.4	9	69.5±4.6
	T5	29	47.8±7.1	8	53.5±6.7	9	49.7±7.7	7	68.3±8.6
MRI SM (kg)	T0	21	25.3±3.3	2	28.6±4.8	2	23.6±4.0	3	36.8±3.3
	T1	40	20.5±3.6	5	21.3±3.1	6	22.5±3.6	10	30.5±5.3
	T2	35	20.7±3.8	5	21.0±3.9	5	22.5±4.3	6	28.5±3.2
	T5	21	19.9±4.3	1	36.1	5	19.3±3.2	5	29.5±6.1

N: number of subjects with data in each category; T0: prior to surgery; T1, T2, and T5: 1, 2, and 5 years after surgery, respectively; Means±SD: unadjusted means and standard deviation for the N listed with complete data; RYGB: Roux-en-Y gastric bypass; Sleeve: sleeve gastrectomy; Band: laparoscopic adjustable gastric band; 3C FFM (kg): fat free mass estimate by 3-compartment model; MRI SM (kg): skeletal muscle mass by MRI.