Why the study?
Poor sleep may be a risk factor or marker for developing depression, but its relationship with future depressive symptoms in workers was unclear.
Does poor sleep increase the incidence of depressive symptoms in male Japanese workers?
Cohort (n=108)
No
Does poor sleep increase the incidence of depressive symptoms in male Japanese workers?
Odds Ratio: 1.3 (95% CI 1.06–1.58)
Absolute Event Rate: 15.7% vs 0%
p-value: p=<0.05
Poor sleep is a significant risk factor or marker for the subsequent development of depression among male workers.
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Eva Brink (2012) conducted a cohort in Depressive symptoms (n=108). Poor sleep (Athens Insomnia Scale score ≥1) vs. No sleeping problems (Athens Insomnia Scale score = 0) was evaluated on Incidence of new depressive symptoms (OR 1.30, 95% CI 1.06-1.58, p=<0.05).
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