That's what the medical media is reporting.
That is not at all what the study shows.
The study shows a correlation between smoking and bad sleep and nothing more.
And the authors document that with citations.
Behavioral variables may also contribute to poorer sleep among cigarette smokers. Since smokers often report using cigarette smoking as a form of stress relief (Fidler & West, 2009) and smokers self-report more daily stress than nonsmokers (Parrot, 1999), it is possible that this increase in stress may be the underlying cause of these sleep disturbances.Rule #1: The pathology Always Always Always comes first.
Second, persons who experience poor sleep may be more likely to smoke cigarettes. It is well known that poor sleep is associated with poor health-related quality of life (Lee et al., 2009) and symptoms of depression and anxiety (Mayers, Grabau, Campbell, & Baldwin, 2009; Paudel et al., 2008; Spira, Stone, Beaudreau, Ancoli-Israel, & Yaffe, 2009), all of which are associated with current cigarette smoking (McClave, Dube, Strine, & Mokdad, 2009; McClave et al., 2009). Poor sleepers may be more likely to smoke than those who sleep well because people who suffer from sleep difficulties experience a lower health-related quality of life and possibly even anxiety and depressive symptoms.
