FIGURE 1.

Relationship between total sleep with CSF AD biomarkers. Scatter plot showing the distribution of values for total sleep time (X-axis) and the Alzheimer’s biomarkers (Y-axis). The horizontal lines show cut-off points for each biomarker. The diagonal lines represent best fit of the linear equation. The correlations between the Aβ42/40 ratio with total sleep (A) was non-statistically significant. In contrast, total tau was negatively correlated with total sleep time (B). Similarly, phosphorylated tau was negatively correlated with total sleep time (C).