Table 3.
Comparison of basal characteristics and resting energy expenditure adjusted for body composition between normal weight, overweight, and obese participants of study population 1.
| Normal weight n = 105 | Over weight n = 92 | Obese n = 104 | |
|---|---|---|---|
| Age, years | 39.6 ± 15.0 | 46.2 ± 14.4 | 37.6 ± 10.7 |
| BMI, kg/m2 | 22.4 ± 1.9 | 27.4 ± 1.6 | 37.6 ± 10.7‡ |
| FM, % | 24.2 ± 9.2 | 30.5 ± 8.7 | 43.6 ± 8.2‡ |
| FM, kg | 15.9 ± 6.1 | 25.3 ± 6.8 | 45.3 ± 12.4‡ |
| Skeletal muscle mass, kg | 24.7 ± 5.8 | 27.8 ± 6.5 | 30.9 ± 7.3‡ |
| Skeletal muscle mass, kg/FFM, kg | 0.49 ± 0.07 | 0.48 ± 0.11 | 0.53 ± 0.06‡ |
| Organ mass, kg | 3.44 ± 0.37 | 3.86 ± 0.44 | 4.05 ± 0.49‡ |
| Organ mass, kg/ FFM, kg | 0.070 ± 0.008 | 0.067 ± 0.009 | 0.071 ± 0.009‡ |
| REEmeasured, MJ/day | 6.08 ± 0.88 | 7.01 ± 1.00 | 7.69 ± 1.14‡ |
| REEmeasured-predicted according to organ and tissue masses, MJ/day | 0.09 ± 0.46 | 0.09 ± 0.50 | 0.16 ± 0.61** |
| REEmeasured-predicted according to FFM and FM regression in normal weight subjects#, MJ/day | −0.04 ± 0.44 | 0.01 ± 0.54 | 0.35 ± 0.63***‡ |
| REEmeasured-predicted according to FFM and FM regression in obese subjects##, MJ/day | −0.33 ± 0.45*** | −0.36 ± 0.52*** | −0.03 ± 0.62‡ |
**
P < 0.01;
***
P < 0.001 difference between measured and predicted REE, paired t-test.
‡
P < 0.05 significantly different from normal and overweight subjects, ANOVA.
#
Regression equation: REE, MJ/day = 0.084 × FFM, kg + 0.007 × FM, kg + 1.748, R2 = 0.75; SEE = 0.44.
##
Regression equation: REE, MJ/day = 0.087 × FFM, kg + 0.015 × FM, kg + 1.963, R2 = 0.71; SEE = 0.62.