Table 3. Body-composition and anthropometric outcomes from baseline to week 8.

Outcome	Group	Baseline	Week 4	Week 8	Δ%	Difference in change vs control (95% CI)	p	Holm p	Hedges g (95% CI)	Group × time p
Body mass (kg)	1v1 SSG	56.76 ± 6.36	54.31 ± 6.13	52.88 ± 5.92	-6.8	-3.45 (-4.25 to -2.65)	< 0.001	< 0.001	-2.64 (-3.46 to -1.81)	< 0.001
	3v3 SSG	56.43 ± 6.81	53.61 ± 6.23	51.82 ± 5.89	-8.2	-4.18 (-4.94 to -3.42)	< 0.001	< 0.001	-3.37 (-4.32 to -2.43)
	Control	56.48 ± 5.29	56.30 ± 5.25	56.05 ± 5.22	-0.8
Body mass index (kg/m2)	1v1 SSG	21.57 ± 2.75	21.00 ± 2.49	20.29 ± 2.59	-6.0	-0.95 (-1.37 to -0.53)	< 0.001	< 0.001	-1.14 (-1.79 to -0.48)	< 0.001
	3v3 SSG	21.10 ± 2.76	20.43 ± 2.52	19.57 ± 2.31	-7.2	-1.19 (-1.61 to -0.77)	< 0.001	< 0.001	-1.45 (-2.13 to -0.77)
	Control	22.00 ± 1.73	21.67 ± 1.53	21.67 ± 1.49	-1.5
Waist circumference (cm)	1v1 SSG	81.14 ± 5.26	78.81 ± 4.31	75.90 ± 3.60	-6.5	-4.14 (-5.45 to -2.83)	< 0.001	< 0.001	-1.95 (-2.69 to -1.21)	< 0.001
	3v3 SSG	81.05 ± 4.24	78.14 ± 4.49	76.76 ± 4.10	-5.3	-3.19 (-4.50 to -1.88)	< 0.001	< 0.001	-1.14 (-1.79 to -0.48)
	Control	80.86 ± 2.78	80.29 ± 3.04	79.76 ± 2.86	-1.4
Hip circumference (cm)	1v1 SSG	99.24 ± 3.43	97.90 ± 3.08	96.62 ± 2.91	-2.6	-1.67 (-2.45 to -0.88)	< 0.001	< 0.001	-0.93 (-1.57 to -0.29)	< 0.001
	3v3 SSG	98.95 ± 5.07	97.90 ± 4.76	97.43 ± 4.32	-1.5	-0.57 (-1.36 to 0.22)	0.155	0.155	-0.39 (-1.00 to 0.22)
	Control	98.05 ± 4.15	97.62 ± 4.39	97.10 ± 4.66	-1.0
Waist-to-hip ratio (A.U.)	1v1 SSG	0.818 ± 0.044	0.808 ± 0.041	0.789 ± 0.035	-3.4	-0.024 (-0.033 to -0.015)	< 0.001	< 0.001	-1.27 (-1.93 to -0.60)	< 0.001
	3v3 SSG	0.820 ± 0.030	0.810 ± 0.031	0.797 ± 0.026	-2.8	-0.019 (-0.028 to -0.010)	< 0.001	< 0.001	-1.30 (-1.96 to -0.63)
	Control	0.818 ± 0.025	0.817 ± 0.030	0.814 ± 0.028	-0.5
Sum of skinfold thicknesses (mm)	1v1 SSG	96.90 ± 15.78	91.85 ± 14.90	86.65 ± 14.20	-10.6	-9.90 (-11.47 to -8.33)	< 0.001	< 0.001	-3.94 (-4.99 to -2.89)	< 0.001
	3v3 SSG	96.37 ± 15.82	90.45 ± 16.20	84.60 ± 15.70	-12.2	-11.42 (-13.21 to -6.63)	< 0.001	< 0.001	-3.99 (-5.05 to -2.93)
	Control	97.15 ± 6.29	97.05 ± 6.08	96.80 ± 6.08	-0.4

Values at each time point are mean ± standard deviation. Δ% was calculated from group means as [(week 8 – baseline) / baseline] × 100. Model estimates are week 8 difference-in-differences versus control from linear mixed-effects models including group, time, and group × time, with participant as a random intercept. Negative model estimates indicate a greater reduction than control. Holm p values were adjusted across the intervention-versus-control contrasts in the anthropometry/body-composition family. Hedges’ g is the standardized between-group difference in baseline-to-week 8 change versus control; CI = confidence interval.