Table 4.
Multiple Linear Regressions of Early-Life Activities and Covariates on Intracranial Volume–Adjusted Thalamus Volume
| Model 1 | Model 2 | Model 3 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Characteristics | B | SE | p | B | SE | p | B | SE | p |
| Age | −45.23 | 21.18 | .036 | −44.65 | 21.26 | .039 | −42.29 | 21.40 | .052 |
| Sex (ref. = male) | |||||||||
| Female | 23.77 | 285.67 | .934 | 6.10 | 287.70 | .983 | −9.14 | 288.16 | .975 |
| Education | −0.67 | 48.65 | .989 | −7.89 | 49.90 | .875 | −14.29 | 50.33 | .777 |
| Late-life activities | 28.39 | 40.87 | .875 | 26.58 | 40.92 | .518 | |||
| Early-life activities | −62.76 | 80.77 | .439 | −73.63 | 82.52 | .375 | 78.67 | 175.11 | .654 |
| EELA × Sex | −187.91 | 190.54 | .327 | ||||||
| ΔR2 | .01 | .02 | |||||||
| R 2 | .05 | .06 | .15 | ||||||
Note: EELA = enriching early-life activity. Unstandardized beta coefficients presented. All models adjusted for age, sex, and education. Model 2 further adjusted for late life activities. Model 3 includes the EELA by sex interaction term.