The paper lists all of those things. Confidence intervals, what the groups are, the baseline. In this case, the baseline are people with no sleep disorders. The

The paper lists all of those things. Confidence intervals, what the groups are, the baseline. In this case, the baseline are people with no sleep disorders. The whole purpose of this study was to elucidate that this is a serious problem for people with sleep disorders. In particular, people with Shift Work Sleep Disorder. This is a press release from a university with a link to the paper so you can discern this stuff yourself. What more transparency do you expect from them? Last time I checked University of Missouri wasn't part of the news media.