TABLE 2.
Model predicting total gray matter volume (n = 92)
| Parameter | 95% Confidence interval | |||||
|---|---|---|---|---|---|---|
| Estimate (β) | SE | t‐value | P | Lower bound | Upper bound | |
| Intercept | 46.9149 | 1.9379 | 24.21 | .000 | 43.0646 | 50.7653 |
| Age | −.2993 | .0303 | −9.89 | .000 | −.3591 | −.2396 |
| CRF | .6502 | .9981 | .65 | .516 | −1.3314 | 2.6318 |
| Sex | −2.6020 | .6199 | −4.20 | .000 | −3.8331 | −1.3708 |
| Education | −.0318 | .1182 | −.27 | .788 | −.2667 | .2031 |
| APOE ε4 status | .0782 | .5145 | .15 | .880 | −.9436 | 1.1000 |
| CRF × age | .2496 | .0988 | 2.53 | .013 | .0544 | .4447 |
Notes: β = Unstandardized beta coefficient; SE = standard error; Sex coded 0 = female, 1 = male. APOE ε4 status coded 0 = non‐carrier, 1 = carrier; †Estimates reflect total gray matter expressed as a percentage of intracranial volume (sum of total gray matter, white matter, and CSF volumes).
Abbreviations APOE, apolipoprotein E; CRF, cardiorespiratory fitness; CSF, cerebrospinal fluid.