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Table 3 Outcome of linear regression analysis on five cognitive domains as dependent variable and the SA constructs as predictors and age, sex and years of education as correlates

From: Processing speed and working memory are predicted by components of successful aging: a HUNT study

Domain

All three components combined

Beta (95% CI), p value

Component I,

Absence of disease

Beta (95% CI), p value

Component II,

High functioning

Beta (95% CI), p value

Component III,

Active engagement

Beta (95% CI), p value

Verbal function

 SA

− 0.19 (− 0.58, 0.20)

− 0.36 (− 0.74, 0.03)

− 0.37 (0.93, 0.19)

0.13 (− 0.27, 0.53)

 Age

0.00 (− 0.03, 0.04)

0.00 (− 0.03, 0.04)

0.00 (− 0.03, 0.04)

0.01 (− 0.03, 0.05)

 Sex

0.19 (− 0.21, 0.59)

0.18 (− 0.21, 0.57)

0.17 (− 0.22, 0.57)

0.22 (− 0.17, 0.62)

 Education

0.25 (0.17, 0.33)***

0.26 (0.18, 0.33)***

0.27 (0.18, 0.34)***

0.26 (0.18, 0.33)***

Visuospatial

 SA

− 0.06 (− 0.58, 0.47)

0.02 (− 0.51, 0.55)

0.04 (− 0.71, 0.79)

0.08 (− 0.46, 0.61)

 Age

− 0.01 (− 0.07, 0.04)

− 0.01 (− 0.06, 0.04)

− 0.01 (− 0.06, 0.04)

− 0.01 (− 0.06, 0.04)

 Sex

0.45 (− 0.09, 0.98)

0.46 (− 0.08, 0.99)

0.46 (− 0.08, 1.00)

0.46 (− 0.07, 0.99)

 Education

− 0.05 (− 0.16, 0.05)

− 0.05 (− 0.16, 0.05)

− 0.05 (− 0.16, 0.05)

− 0.05 (− 0.16, 0.05)

Processing speed

 SA

0.35 (0.00, 0.70)

0.39 (0.05, 0.74)*

0.43 (− 0.07, 0.93)

0.11 (− 0.25, 0.47)

 Age

− 0.05 (− 0.08, − 0.01)**

− 0.05 (− 0.08, − 0.02)**

− 0.05 (− 0.08, − 0.02)**

− 0.06 (− 0.09, − 0.02)**

 Sex

− 0.67 (− 1.02, − 0.31)***

− 0.68 (− 1.03, − 0.34)***

− 0.67 (− 1.03, − 0.32)***

− 0.72 (− 1.08, − 0.36)***

 Education

0.02 (− 0.05, 0.09)

0.02 (− 0.05, 0.09)

0.01 (− 0.06, 0.08)

0.02 (− 0.05, 0.09)

Episodic memory

 SA

0.04 (− 0.37, 0.46)

− 0.23 (− 0.64, 0.19)

0.17 (− 0.43, 0.76)

0.21 (− 0.21, 0.63)

 Age

− 0.03 (− 0.07, 0.02)

− 0.03 (− 0.07, − 0.01)

− 0.02 (− 0.06, − 0.02)

− 0.02 (− 0.06, 0.01)

 Sex

− 0.48 (− 0.90, − 0.05)*

− 0.51 (− 0.93, − 0.09)*

− 0.47 (− 0.89, − 0.04)*

− 0.47 (− 0.89, − 0.06)*

 Education

0.03 (− 0.05, 0.12)

0.03 (− 0.05, 0.12)

0.03 (− 0.05, 0.11)

0.03 (− 0.05, 0.12)

Working memory

 SA

0.28 (− 0.11, 0.67)

0.40 (0.02, 0.79)*

0.22 (− 0.35, − 0.78)

0.15 (− 0.26, 0.55)

 Age

− 0.00 (− 0.04, 0.04)

− 0.00 (− 0.04, 0.04)

− 0.01 (− 0.04, 0.03)

− 0.01 (− 0.05, 0.03)

 Sex

0.24 (− 0.16, 0.64)

0.24 (− 0.16, 0.62)

0.22 (− 0.19, 0.62)

0.20 (− 0.20, 0.60)

 Education

0.09 (0.01, 0.17)*

0.09 (0.01, 0.16)*

0.08 (− 0.00, 0.16)

0.08 (0.00, 0.16)*

  1. Significant effects (p < 0.05), 95% CI and beta weights are presented in bold type. *p < 0.05; **p < 0.01; ***p < 0.001