Phase angle and non-alcoholic fatty liver disease before and after bariatric surgery

Table 8 Phase angle and body composition in patients who underwent liver biopsy after bariatric surgery, n = 33

Variables	Pre	Post	P value
	mean ± SD	mean ± SD
BMI in kg/m²	45.2 ± 6.9	31.8 ± 5.4	< 0.001
SMM in kg	31.9 ± 6.8	27.1 ± 5.3	< 0.001
BCM in kg	37.0 ± 7.8	32.1 ± 5.9	< 0.001
Fat mass in kg	60.7 ± 13.3	33.6 ± 11.1	< 0.001
% Fat	51.6 ± 3.5	39.8 ± 8.2	< 0.001
Visceral fat area in cm²	249.3 ± 23.1	162.5 ± 52.3	< 0.001
PA full body °	5.93 ± 0.65	4.91 ± 0.60	< 0.001
PA RA °	5.55 ± 0.77	4.61 ± 0.64	< 0.001
PA LA °	5.44 ± 0.86	4.44 ± 0.58	< 0.001
PA Tr °	7.84 ± 1.24	6.73 ± 1.03	< 0.001
PA RL °	6.42 ± 0.72	5.18 ± 0.68	< 0.001
PA LL °	6.38 ± 0.74	5.19 ± 0.66	< 0.001

BCM: Body cell mass; BMI: Body mass index; LA: Left arm; LL: Left leg; PA: Phase angle; RA: Right arm; RL: Right leg; SMM: Skeletal muscle mass; Tr: Torso.