This confirms results from a previous study that showed self-reported daytime napping is associated with higher levels of CRP in older British adults.26 The association seen between daytime sleep and these markers of inflammation may provide an explanation for the excess all-cause mortality observed in those with daytime napping or EDS.8 9 While both of these studies have adjusted for diabetes, neither has adjusted for inflammation. The gene discussed is CRP; the disease is diabetes mellitus.