Table 2. Regressions and Correlations.
A. Regression equations relating different components of EE to body composition/weight without addition of fractional weight loss as a covariate.
B. Regression equations relating EE to body composition in all weight reduced subjects and in subjects at each weight plateau period. Residuals are calculated. Independent variables in italics are significant covariates of the dependent variable or, in the case of the intercept, significantly different from zero.
C. Correlations of changes in body weight, composition, and energy stores with changes and residuals in Twenty-four Hour EE (TEE), Resting EE (REE), the Thermic Effect of Feeding (TEF), and non-Resting EE (NREE) following a 10% weight loss from Wtinitial to Wt−10% and from Wt−20% to Wt−10%. N.S. – Not Significant. Significant correlations are in bold type
| A. | Overall Regression | Regression including % Weight Loss |
|---|---|---|
| TEE (kcal/day) |
211 + 26.5 (FFM) + 16.7 (FM) Overall adjusted R2=0.77, p<0.0001 Semipartial rFFM =0.56, p<0.0001 Semipartial rFM=0.40, p<0.0001 Intercept not significantly different from zero |
692 + 27.1 (FFM) + 10.8 (FM) + 26.1 (% Weight Loss) Overall adjusted R2=0.85, p<0.0001 Semipartial rFFM =0.57, p=0.0001 Semipartial rFM=0.25, p<0.0001 Semipartial rweight plateau =0.27, p<0.0001 Intercept p=0.0007 |
| REE (kcal/day) |
204 + 20.6 (FFM) + 4.4 (FM) Overall adjusted R2=0.75, p<0.0001 Semipartial rFFM =0.71, p<0.0001 Semipartial rFM=0.18, p=0.011 Intercept not significantly different from zero |
402 + 20.8 (FFM) + 2.4 (FM) +10.7 (% Weight Loss) Overall adjusted R2=0.78, p<0.0001 Semipartial rFFM =0.72, p<0.0001 Semipartial rFM=0.09, not significant Semipartial rweight plateau = 0.18, p=0.017 Intercept p=0.0042 |
| NREE (kcal/day) |
−94 + 8.5 (Weight) Overall R2 = 0.43, p<0.0001 Intercept not significantly different from zero |
247 + 7.0 (Weight) + 16.4 (% Weight Loss) Overall adjusted R2=0.52, p<0.0001 Semipartial rWeight =0.50, p<0.0001 Semipartial rweight plateau=0.32, p=0.0022 Intercept not significantly different from zero |
| B. | Regression Including Wt−10% and Wt−20% | Regressions at each plateau | Residuals vs. Wtinitial |
|---|---|---|---|
| TEE (kcal/day) |
597 + 27.8 (FFM) + 8.4 (FM) + 16.5 (% Weight Loss) Overall adjusted R2=0.81, P<0.0001 Semipartial rFFM =0.67, p<0.0001 Semipartial rFM = 0.21, p=0.024 Semipartial rweight plateau = 0.13, p=0.097 Intercept p=0.029 |
Wtinitial: 588 + 26.6(FFM) + 13.6(FM) Overall adjusted R2=0.79, P<0.0001 Wt−10% : 482 + 27.4(FFM) + 7.8(FM) Overall adjusted R2=0.76, P<0.0001 Wt−20% : 215 + 28.3(FFM) + 9.0(FM) Overall adjusted R2=0.80, P<0.0001 |
Wt−10%: −356 (292) P=0.0002 vs. 0 Wt−20%: −471 (248) P<0.0001 vs. 0 P=0.015 vs Wt−10% |
| REE (kcal/day) |
300 + 20.8 (FFM) + 1.5 (FM) + 2.3 (% Weight Loss) Overall adjusted R2=0.72, p<0.0001 Semipartial rFFM =0.75, P<0.0001 Semipartial rFM = 0.03, Not Significant Semipartial rweight plateau = 0.06, Not Significant Intercept not significantly different from zero |
Wtinitial: 356 + 21.1(FFM) + 3.3(FM) Overall adjusted R2=0.84, P<0.0001 Wt−10% : 174 + 23.1(FFM) + 0.8(FM) Overall adjusted R2=0.75, P<0.0001 Wt−20% : 211 + 22.9 (FFM) + 0.8 (FM) Overall adjusted R2=0.60, P=0.0003 |
Wt−10%: −190 (208) P=0.0002 vs. 0 Wt−20%: −186 (235) P<0.0001 vs. 0 P not significant vs Wt−10% |
| NREE (kcal/day) |
311 + 6.4 (Weight) + 16.8 (% Weight Loss) Overall adjusted R2=0.34, P=0.0006 Semipartial rWeight =0.50, p=0.0014 Semipartial rweight plateau=0.23, not significant Intercept not significantly different from zero |
Wtinitial: 142 + 7.8(Weight) R2=0.48, P=0.0019 Wt−10%: 213 + 5.8(Weight) R2=0.27, P=0.034 Wt−20%: −99 + 7.2 (Weight) R2=0.31, P=0.022 |
Wt−10%: −166 (288) P=0.035 vs. 0 Wt−20%: −285 (247) P=0.0006 vs. 0 P = 0.083 vs Wt−10% |
| C. | Delta Weight | Delta FFM | Delta FM | Delta Energy Stores | ||||
|---|---|---|---|---|---|---|---|---|
| Wt−10% vs. Wtinitial |
Wt−20% vs. Wt−10% |
Wt−10% vs. Wtinitial |
Wt−20% vs. Wt−10% |
Wt−10% vs. Wtinitial |
Wt−20% vs. Wt−10% |
Wt−10% vs. Wtinitial |
Wt−20% vs. Wt−10% |
|
| Delta TEE | R=0.44, p=0.085 | R=0.70, P=0.002 | N.S. | N.S. | N.S. | R=0.63, P=0.007 | N.S. | R=0.64, P=0.005 |
| TEE Residual | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. |
| Delta REE | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. |
| REE Residual | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. | N.S. |
| Delta NREE | R=0.47 P=0.059 | R=0.53, P=0.029 | N.S. | N.S. | N.S. | R=0.54, P=0.026 | R=0.43, p=0.088 | R=0.54, P=0.025 |
| NREE Residual | R=−0.41, P=0.091 | N.S. | R=0.48 P=0.051 | N.S. | N.S. | N.S. | N.S. | N.S. |