Table 2.

Characteristics of the study sample for the calibration and validation groups

	All (n = 126)	Calibration group (n = 75)	Validation group (n = 51)
Age, yrs	26.9 ± 9.1	26.8 ± 9.0	27.1 ± 9.5
Weight, kg	71.3 ± 10.9	71.4 ± 11.3	71.1 ± 10.6
Stature, cm	177 ± 7	177 ± 7	177 ± 7
BMI, kg/m2	22.8 ± 2.7	22.8 ± 2.8	22.8 ± 2.6
MREE, kcal/die	1831 ± 250	1834 ± 261	1826 ± 234
RQ	0.821 ± 0.07	0.832 ± 0.07	0.822 ± 0.07
BI-index, cm2/Ω	65.9 ± 9.6	65.9 ± 9.8	66.0 ± 9.4
PhA, degrees	7.76 ± 0.76	7.79 ± 0.74	7.73 ± 0.78

Data are expressed as mean ± standard deviation

BMI body mass index, MREE measured resting energy expenditure, RQ respiratory quotient, BI-index bioimpedance index, PhA phase angle