Table 3.
Multiple regression analysis with insulin, triglyceride, and blood pressure as the dependent variables with DXA-measured trunk fat as the central fat index*
| β | P | R2 | |
|---|---|---|---|
| Insulin (log-transformed) | |||
| Intercept | 1.56 | 0.01 | 0.44 |
| Trunk fat (log-transformed) | 0.28 | 0.01 | |
| Total fat | 0.03 | 0.03 | |
| Triglyceride (log-transformed) | |||
| Intercept | −0.25 | 0.01 | 0.11 |
| Trunk fat | 0.04 | 0.01 | |
| Systolic blood pressure | |||
| Intercept | 56.44 | 0.01 | 0.45 |
| Sex (boy = 1, girl = 0) | 20.62 | 0.06 | |
| Trunk fat | −3.37 | 0.11 | |
| Total fat | 2.46 | 0.02 | |
| Height (cm) | 0.29 | 0.01 | |
| Interaction (sex × height) | −0.15 | 0.09 | |
| Diastolic blood pressure | |||
| Intercept | 36.39 | 0.01 | 0.39 |
| Sex (boy = 1, girl = 0) | 4.02 | 0.01 | |
| Trunk fat | −7.92 | 0.03 | |
| Total fat | 4.33 | 0.01 | |
| Height (cm) | 0.16 | 0.01 | |
| Interaction (sex × trunk fat) | 9.03 | 0.02 | |
| Interaction (sex × total fat) | −4.59 | 0.01 |
*
The initial model included age, sex, waist, weight, height, and interactions between sex and waist, sex and weight, and sex and height The independent variable with the largest p value was removed in a stepwise backward elimination procedure until all variables remaining in the model were statistically significant (p < 0.05) or until the central fat index was the next variable to be removed.