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Table 5 Odds for having EDS, defined as ESS > 10. Penalized maximum likelihood logistic regression

From: Excessive daytime sleepiness in secondary chronic headache from the general population

   Bivariate (n = 81–86)    Multivariable (n = 81)  
Covariate n Odds ratio 95% CI P n Odds ratio 95% CI P
Headache type
 Posttraumatic/cervicogenica 47 1    45 1   
 Rhinosinusitis 39 1.27 (0.48 to 3.39) 0.63 36 1.71 (0.55 to 5.35) 0.35
Medication-overuse
 Noa 42 1    41 1   
 Yes 44 0.44 (0.16 to 1.21) 0.11 40 0.44 (0.16 to 1.25) 0.12
Propensity score (age, sex, headache frequency, migraine) 81 0.77 (0.07 to 8.33) 0.83 81 0.35 (0.02 to 5.53) 0.45
  1. aReference category