Figure 2. Number of participants in each SJL group from case and control populations.

The group with SJL of less than one hour had 92 participants from the control group and 85 from the case group. The group with SJL of one hour to less than two hours included 44 participants from the control group and 47 from the case group. Some of the participants had SJL of two hours or more, and this group had 75 from the control group and 83 from the case group

SJL: social jetlag