Bland-Altman plot of the difference in the average VO₂ (ml/kg/min) values in 19 participants.

<p>Bland-Altman plot of the difference in the average VO₂ (ml/kg/min) values in 19 participants.</p

Comparison of measures for Cosmed K4b² and Medgraphics (mean ± SD), overall (N = 19) and stratified by gender (N = 9 females, N = 10 males).

<p>*From paired t-tests.</p

Correlations among measurements of VO₂ (ml/kg/min), VO₂ (ml/min), and VCO₂ (ml/min) between tests (N = 19).

<p>Correlations among measurements of VO₂ (ml/kg/min), VO₂ (ml/min), and VCO₂ (ml/min) between tests (N = 19).</p

Participant characteristics (mean ± SD).

<p>*significant at the p = 0.05 level.</p

Comparison of VO₂ (ml/min) values between the Cosmed K4b² and Medgraphics metabolic analyzers.

<p>Comparison of VO₂ (ml/min) values between the Cosmed K4b² and Medgraphics metabolic analyzers.</p

Comparison of VO₂ (ml/kg/min) values between the Cosmed K4b² and Medgraphics metabolic analyzers.

<p>Comparison of VO₂ (ml/kg/min) values between the Cosmed K4b² and Medgraphics metabolic analyzers.</p

Comparison of VCO₂ (ml/min) values between the Cosmed K4b² and Medgraphics metabolic analyzers.

<p>Comparison of VCO₂ (ml/min) values between the Cosmed K4b² and Medgraphics metabolic analyzers.</p

Estimates of the association between BDNF and cross-sectional and longitudinal cognitive test scores (change in test score per 1 SD increase in BDNF).

<p>Unadjusted model contained: BDNF (standardized), time, BDNF*time.</p><p>Adjusted model contained: BDNF (standardized), race, sex, history of myocardial infarction, smoking, platelet count (standardized), APOE ε4, age at enrollment, educationth grade, depression, time, and all covariate interactions with time.</p><p>Regression model estimates and 95% confidence intervals from linear mixed effects models are provided.</p

Distribution of participant characteristics by BDNF tertile.

<p>P-values come from ANOVA and Chi-square tests, as appropriate. BDNF = brain derived neurotrophic factor, 3MS = Teng Modified Mini-Mental Status Exam, DSST = Digit Symbol Substitution Test, CVD = cerebrovascular disease, MI = myocardial infarction.</p

Characteristics of study participants.^a

<p>Note. N  =  642 for fast walking pace on the 400-m walking corridor, N  =  634 for normal walking, N  =  441 for rest data.</p