Figure 2
From: Chronotype Genetic Variant in PER2 is Associated with Intrinsic Circadian Period in Humans
Circadian period of CBT and melatonin rhythms by PER2 rs35333999 genotype in the multiethnic in-laboratory study sample. Data for mean (squares) and individual (circles) circadian period of core body temperature (A) and melatonin (B) are shown for T-allele carriers (open symbols) and for non-T allele carriers (filled symbols). Vertical lines denote the standard error (SE) measures of the mean. T-allele carriers had significantly longer circadian period of temperature (p = 0.022) and a trend for longer circadian period of melatonin (p = 0.051) than non-carriers.
