Table 2.
Cognitive performance indices at baseline (T1) and follow-up (T2)
| Correlation with age |
|||||
|---|---|---|---|---|---|
| Test | Baseline | Follow-up | Paired t | Baseline | Follow-up |
| Fluid intelligence | |||||
| Letter series | 9.40 | 9.53 | 0.52 | −0.19 | −0.42*** |
| Cattell IQ form 2 | 99.79 | 99.97 | 0.14 | −0.42*** | −0.53*** |
| Cattell IQ form 3 | 107.08 | 97.57 | −6.59*** | −0.42*** | −0.55*** |
| Raw subtest 1 | 7.22 | 5.66 | −9.61*** | −0.41*** | −0.48*** |
| Raw subtest 2 | 6.60 | 6.54 | −0.28 | −0.21* | −0.32** |
| Raw subtest 3 | 5.33 | 4.67 | −3.62*** | −0.32** | −0.32** |
| Raw subtest 4 | 5.34 | 5.41 | 0.37 | −0.27* | −0.52*** |
| WM | |||||
| LSPAN | 22.17 | 17.08 | −4.71*** | −0.36*** | −0.45*** |
| CSPAN | 15.78 | 13.41 | −2.39* | −0.27* | −0.28* |
| SJS | 9.14 | 9.01 | −0.73 | −0.40*** | _047*** |
| Crystallized intelligence | |||||
| Vocabulary | 27.26 | 27.16 | −0.19 | 0.23* | 0.13 |
*
Note: P < 0.05
**
P < 0.01
***
P < 0.001.