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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