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. Author manuscript; available in PMC: 2014 Jul 30.
Published in final edited form as: J Sleep Res. 2013 Oct 18;23(2):133–142. doi: 10.1111/jsr.12096

Figure 1.

Figure 1

Mean illness bouts, mean duration of illness, and mean illness-related absences by sex and academic level, with mean weeknight total sleep time from January to May shown as a continuous variable. The left-hand graph shows 9th/10th graders, while the right-hand graph shows 11th/12th graders. Open circles represent males, and filled circles represent females. Dotted lines show a line of best fit for males, while solid lines show a line of best fit for females.