Table 2.
Regression estimates for tested models using Generalized Estimating Equations (GEE).
| Predictor | Model 1 | Model 2 | Model 3 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| B | SE | p | B | SE | p | B | SE | p | |
| Intercept | 1.73** | 0.10 | < 0.01 | −2.36 | 1.96 | 0.23 | −0.14 | 1.37 | 0.92 |
| Time (post-test) | 1.86** | 0.27 | < 0.01 | 1.86** | 0.27 | < 0.01 | −2.57 | 2.39 | 0.28 |
| Sex (female) | – | – | 0.77* | 0.35 | 0.03 | 0.78* | 0.35 | 0.03 | |
| Age | – | – | −0.01 | 0.02 | 0.58 | −0.01 | 0.02 | 0.58 | |
| Years of education | – | – | 0.02 | 0.04 | 0.58 | 0.02 | 0.04 | 0.58 | |
| Intellectual activity | – | – | 0.10 | 0.11 | 0.35 | 0.19** | 0.06 | < 0.01 | |
| Physical activity | – | – | −0.16** | 0.06 | < 0.01 | −0.05 | 0.04 | 0.24 | |
| Social activity | – | – | −0.03 | 0.07 | 0.67 | −0.09* | 0.04 | 0.02 | |
| Cumulative illness | – | – | 0.24** | 0.08 | < 0.01 | 0.10* | 0.04 | 0.02 | |
| Intellectual activity × Time | – | – | – | – | −0.19 | 0.16 | 0.24 | ||
| Physical activity × Time | – | – | – | – | −0.23* | 0.10 | 0.02 | ||
| Social activity × Time | – | – | – | – | 0.11 | 0.11 | 0.30 | ||
| Cumulative illness × Time | – | – | – | – | 0.28* | 0.12 | 0.02 | ||
| R2 | 0.15 | 0.29 | 0.34 | ||||||
B, unstandardized regression coefficient; SE, standard error. *p < 0.05, **p < 0.01.