Table 2.

Changes (Δ) in body weight, body composition and metabolic variables at rest after interventions by group.

Variables	CR (n=15)	CR+SR (n=21)	p value
Δ body weight, kg	−3.3 ± 3.2	−3.2 ± 2.5	0.87
Weight loss relative to baseline, %	−3.7 ± 3.3	−3.1 ± 2.5	0.54
Δ DXA total mass, kg	−2.7 ± 2.4	−2.5 ± 2.4	0.86
Δ fat mass, kg	−1.9 ± 2.1	−1.8 ± 1.7	0.85
Δ lean body mass, kg	−0.71 ± 0.93	−0.72 ± 1.2	0.99
Δ percent body fat, %	−0.99 ± 1.4	−0.82 ± 1.0	0.67
Total mass loss as fat mass, %	80.7 ± 43.3	16.9 ± 104.5	0.016a
	82.7 (58.6, 111.6)*	58.4 (−12.7, 73.6)*
Total mass loss as lean mass, %	17.3 ± 43.1	84.8 ± 110.2	0.018a
	16.7 (−15.8, 37.8)*	38.6 (27.1, 110.4)*
Δ resting metabolic rate, kcal·day−1	79 ± 152	−11± 193	0.16
Δ respiratory exchange ratio	−0.02 ± 0.03	−0.004 ± 0.06	0.35

Data are mean ± SD. P values are for comparisons between CR and CR+SR groups. These p values were compared to 0.025 to denote statistical significance according to Bonferroni adjustment for multiple comparisons of these variables between groups and races (Table 3). Change values were calculated by subtracting baseline from post-intervention values.

CR, caloric restriction; SR, sleep restriction. DXA, dual-energy x-ray absorptiometry.

^*Median (interquartile range)

^aMann-Whitney U test.