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. Author manuscript; available in PMC: 2020 Feb 1.
Published in final edited form as: Neurobiol Aging. 2018 Oct 23;74:161–170. doi: 10.1016/j.neurobiolaging.2018.10.021

Table 2.

Summary of main effects of sex and BDNF Val66Met genotype, and their interaction on DSST intercept and slope, stratified by participant race.

Predicting DSST in white participants
Predicting intercept F value degrees of freedom P value
Sex 51.1 1, 1598 <.001
BDNF genotype 0.2 1, 1599 .66
Sex X BDNF genotype 7.4 1, 1599 <.01
Predicting change over time
Time 61.9 1, 1260 <.001
Sex X Time 2.2 1, 1184 .14
BDNF genotype X Time 1.0 1, 1184 .32
Sex X BDNF genotype X Time 4.1 1, 1183 .04
Predicting DSST in black participants
Predicting intercept F value degrees of freedom P value
Sex 14.4 1, 1034 <.001
BDNF genotype 4.7 1, 1034 .03
Sex X BDNF genotype 0.1 1, 1034 .82
Predicting change over time
Time 39.5 1, 736 <.001
Sex X Time 0.01 1, 787 .94
BDNF genotype X Time 0.02 1, 789 .89
Sex X BDNF genotype X Time 0.01 1, 792 .92

Note: Not shown are the effects of the covariates: age, CES-D, education, clinical site, average amount of self-reported time spent walking, and diabetes.