Table 3.
Multiple Linear Regressions of Early-Life Activities and Covariates on Intracranial Volume–Adjusted Amygdala Volume (N = 90)
| Model 1 | Model 2 | Model 3 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Characteristics | B | SE | p | B | SE | p | B | SE | p |
| Age | −20.42 | 8.19 | .015 | −20.44 | 8.23 | .015 | −18.97 | 8.26 | .024 |
| Sex (ref. = male) | |||||||||
| Female | 14.28 | 112.01 | .899 | 11.99 | 113.50 | .916 | 2.48 | 113.15 | .983 |
| Education | −4.10 | 18.76 | .828 | −4.76 | 19.29 | .806 | −7.89 | 19.33 | .684 |
| Late-life activities | 2.63 | 15.84 | .868 | 1.72 | 15.78 | .914 | |||
| Early-life activities | 67.73 | 31.41 | .034 | 66.56 | 32.37 | .043 | 150.16 | 69.48 | .034 |
| EELA × Sex | −102.25 | 75.29 | .178 | ||||||
| ΔR2 | .00 | .02 | |||||||
| R 2 | .13 | .13 | .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.