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

Table 3 Variation of body composition before and after bariatric surgery, n = 379

Variables	Pre	Post	P value
	mean ± SD	mean ± SD
BMI in kg/m²	45.9 ± 7.5	31.2 ± 5.0	< 0.001
SMM in kg	34.1 ± 7.5	29.0 ± 6.4	< 0.001
BCM in kg	39.4 ± 8.3	33.9 ± 6.9	< 0.001
Fat mass in kg	62.6 ± 15.1	31.9 ± 11.1	< 0.001
% Fat	50.7 ± 4.6	37.2 ± 8.1	< 0.001
Visceral fat area in cm²	243.7 ± 31.2	152.0 ± 51.0	< 0.001

BCM: Body cell mass; BMI: Body mass index; SD: Standard deviation; SMM: Skeletal muscle mass.