Table 3.

Results of Multivariate Logistic Regression

PredictorUnst. βOR (95% CI)P
Number of comorbid conditions*0.782.19 (1.13 to 4.22).020
Level of education0.511.67 (1.11 to 2.51).014
Mean sleep duration per night (past month)−0.350.71 (0.52 to 0.96).026
Insomnia-related daytime impairment0.732.07 (1.06 to 4.03).033
  • * On a scale of 0, 1 to 2, or 3+ conditions.

  • On a 5-point scale, as detailed in Table 2.

  • On a 3-point scale (‘somewhat,’ ‘much,’ ‘very much’; subjects who responding less than ‘somewhat’ did not meet sample criteria).