Table 2 Zero-order correlations among key model variables

1. IADL Performance (T1)

-

2. IADL Performance (T2)

0.671**

-

3. IADL Meaning (T1)

0.226**

0.209**

-

4. IADL Meaning (T2)

0.282**

0.415**

0.265**

-

5. Social Activity Performance (T1)

0.618**

0.547**

0.197**

0.244**

-

6. Social Activity Performance (T2)

0.533**

0.675**

0.119**

0.351**

0.670**

-

7. Social Activity Meaning (T1)

0.275**

0.225**

0.473**

0.212**

0.469**

0.316**

-

8. Social Activity Meaning (T2)

0.292**

0.391**

0.170**

0.548**

0.398**

0.569**

0.345**

-

9. Quality of Life (T1)

0.499**

0.416**

0.287**

0.247**

0.545**

0.448**

0.379**

0.295**

-

10. Quality of Life (T2)

0.376**

0.505**

0.148**

0.334**

0.430**

0.533**

0.255**

0.400**

0.527**

-