Table 4:

Proportions and relative risk ratios of co-occurring sleep disturbances, compared with 0 sleep disturbances, by stroke status*

No. of sleep disturbancesStrokeNo. of respondentsProportion, %Unadjusted RR ratio (95% CI)Model 1 RR ratio (95% CI)Model 2 RR ratio (95% CI)
0No23 60151.8Ref.Ref.Ref.
1No13 28430.41.31 (0.99–1.74)1.40 (1.05–1.87)1.29 (0.96–1.72)
2No648613.41.77 (1.27–2.47)1.89 (1.35–2.66)1.39 (0.98–1.99)
3No20713.93.96 (2.68–5.86)3.77 (2.50–5.69)2.53 (1.63–3.93)
4No2800.58.35 (4.10–17.01)7.42 (3.51–15.70)4.51 (2.04–9.95)
  • Note: CI = confidence interval, Ref. = reference category, RR = relative risk.

  • * The proportion (%) of each type of sleep disturbance was weighted to the Canadian population. The risk of having a given number of sleep disturbances relative to 0 sleep disturbances, and the ratio of this risk among respondents who reported a stroke (compared with those who did not), was used to calculate RR ratios. Model 1 controlled for the effects of age, diabetes, sex, education level, body mass index, physical activity level, alcohol consumption and smoking status. Model 2 controlled for the same factors as Model 1, with the addition of arthritis, asthma, cancer, heart disease, high blood cholesterol, high blood pressure, mood disorder and anxiety disorder.

  • Defined by responding yes to the question, “Do you suffer from the effects of a stroke?”

  • Of 45 722 respondents without effects of stroke and 682 with effects of stroke.