Body composition changes after bariatric surgery in adults with obesity and hepatic steatosis

doi:10.4240/wjgs.v18.i7.118280

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World Journal of Gastrointestinal Surgery

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1948-9366

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

Retrospective Cohort Study

Copyright: ©Author(s) 2026. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial (CC BY-NC 4.0) license. No commercial re-use. See permissions. Published by Baishideng Publishing Group Inc.

World J Gastrointest Surg. Jul 27, 2026; 18(7): 118280
Published online Jul 27, 2026. doi: 10.4240/wjgs.v18.i7.118280

Table 2 Preoperative and postoperative bioelectrical impedance analysis data—categorical variables, n (%)

Categorical variables	Preoperative, n = 91	Postoperative, n = 91	Δ	P value
REF total body water				< 0.001^b
Below	-	-	0
Normal	4 (4.4)	42 (46.15)	38
Above	87 (95.6)	49 (53.85)	-38
REF proteins				< 0.001^b
Below	-	-	0
Normal	6 (6.59)	46 (50.55)	40
Above	85 (93.41)	45 (49.45)	-40
REF minerals				< 0.001^b
Below	-	-	0
Normal	6 (6.59)	16 (17.58)	10
Above	85 (93.41)	75 (82.42)	-10
REF fat mass				< 0.001^b
Below	-	-	0
Normal	1 (1.1)	7 (7.69)	6
Above	90 (98.9)	84 (92.31)	-6
REF skeletal muscle mass				< 0.001^b
Below	-	1 (0.011)	1
Normal	4 (4.4)	41 (45.05)	37
Above	87 (95.6)	49 (53.85)	-38
REF body fat percentage				< 0.001^b
Below	-	-	0
Normal	-	4 (4.4)	4
Above	91 (100)	87 (95.6)	-4
REF intracellular water				< 0.001^b
Below	-	1 (1.1)	1
Normal	6 (6.59)	45 (49.45)	39
Above	85 (93.41)	42 (46.15)	-43
REF extracellular water				< 0.001^b
Below	-	-	0
Normal	6 (6.59)	31 (34.07)	25
Above	85 (93.41)	57 (62.64)	-28
REF body cell mass				< 0.001^b
Below	-	1 (1.1)	1
Normal	7 (7.69)	40 (43.96)	33
Above	84 (92.31)	47 (51.65)	-37

^bP < 0.01.

χ² test. REF: Reference values.

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Citation: Schmitt LKT, Ferreira LF, Mottin CC, Lacerda BG, Zubiaurre PR, Teixeira JM, Marroni CA, Fernandes SA. Body composition changes after bariatric surgery in adults with obesity and hepatic steatosis. World J Gastrointest Surg 2026; 18(7): 118280
URL: https://www.wjgnet.com/1948-9366/full/v18/i7/118280.htm
DOI: https://dx.doi.org/10.4240/wjgs.v18.i7.118280

Schmitt LKT, Ferreira LF, Mottin CC, Lacerda BG, Zubiaurre PR, Teixeira JM, Marroni CA, Fernandes SA. Body composition changes after bariatric surgery in adults with obesity and hepatic steatosis. World J Gastrointest Surg 2026; 18(7): 118280 [DOI: 10.4240/wjgs.v18.i7.118280]

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