Figure 2. Interactions between cognitive reserve proxies. Education (A) Cognitive Activities Questionnaire for the mid-life period (B) and Lifetime of Experiences Questionnaire for the mid-life period (C) and slow wave sleep (SWS) on executive function (left panels) and episodic memory (right panels) composite scores. Marginal effect slopes were derived from the minimum (black) and the maximum (orange) value of the corresponding cognitive reserve proxy. Shaded areas represent 95% confidence intervals. Statistical values refer to the interactive term (SWS*CR proxy) and were obtained from general linear models, adjusted for age and sex.