Table 5.
Hierarchical multiple regression analyses predicting change in health-related quality of life (PCS; post – baseline) according to lifestyle-based intervention, stress, and social support (N=167).
| Independent variable | ΔR2 | β a |
|---|---|---|
| Step 1: demographic variables | 0.03 | |
| Education | ||
| Less than high school graduateb | ||
| High school graduate | −0.04 | |
| Some college or technical school | −0.04 | |
| Four years of college or more | −0.07 | |
| Gender | ||
| Maleb | ||
| Female | −0.03 | |
| Race | ||
| Whiteb | ||
| African American | −0.01 | |
| Hispanic/Latino | −0.01 | |
| Asian | −0.03 | |
| Others | 0.03 | |
| Age (years) | 0.06 | |
| Monthly income | ||
| $0 - $999b | ||
| $1,000 - $1,999 | −0.01 | |
| $2,000 - $2,999 | 0.12 | |
| $3,000 or more | 0.04 | |
|
| ||
| Step 2 | 0.10∗∗∗ | |
| PCS at baseline (points) | −0.38∗∗∗ | |
|
| ||
| Step 3 | <0.01 | |
| Control groupb | ||
| Intervention group | 0.04 | |
|
| ||
| Step 4 | 0.05 | |
| Stress at baseline (points) | −0.13 | |
| Change in stress | −0.18∗ | |
| Social support at baseline (points) | 0.12 | |
| Change in social support | 0.07 | |
| Total R2 | 0.18∗ | |
Note. PCS: physical component summary. aβ shown is for the last step. bReference category. ∗p < 0.05; ∗∗p < 0.01; ∗∗∗p < 0.001.