Figure 2

Correlation Between Male and Female ME Survey Scores and Right Hand Acrophase. Correlation between Morning-evening activity preference (ME Survey) and acrophase. ME survey scores correlated with right hand acrophase (shown) in males (A, Pearson's r = -0.55, p = 0.0001) and females (B, Pearson's r = -0.34, p = 0.02); ME survey scores also correlated with left hand acrophase (not shown) in males (Pearson's r = -0.56, p < 0.0001) and showed a correlation trend in females (Pearson's r = -0.25, p = 0.09). The negative correlation indicates that the higher the ME score, the earlier the acrophase is reached (indicating more morning-type tendencies). Mean right acrophase is denoted by a dashed line.