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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Clin Neurophysiol. 2019 Mar 18;130(6):893–902. doi: 10.1016/j.clinph.2019.02.019

Figure 1:

Figure 1:

Significant relationships between age and fast spindle 1) frequency 2) amplitude, 3) duration and 4) central sigma power. To show relationships between spindle characteristics and age after controlling for additional factors, residuals are plotted after adjusting for the effect of site, sex and race. R2 = the R2 of the full model, which included age and demographic variables, β= the β of the main effect of age within each model.