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Table 3 Results of a model using age, sex, baseline YMRS score and chronotype to predict the number of hypomania/mania episodes during the follow up period as derived from the LIFE interview

From: Late chronotype predicts more depressive symptoms in bipolar disorder over a 5 year follow-up period

  Rate ratio [95% CI]
  Age (years) Sex (male) YMRS Early chronotype Late chronotype
Hypomania/mania 0.999
[0.995–1.002]
1.142
[1.034–1.260]
1.050
[1.041–1.060]
0.921
[0.797–1.065]
0.747
[0.646–0.863]
  1. Females and normal chronotype were used as reference groups
  2. Bold RRs are significant at p < 0.01