Table 2:

Comparison of incidence and hazard ratio of stroke between dengue and control cohorts

VariableControl cohortDengue cohortCrude HR (95% CI)Adjusted HR (95% CI)
No. of eventsPYRate*No. of eventsPYRate*
Total stroke405108 8473.72557104 5635.331.43 (1.26–1.63)1.16 (1.01–1.32)
Sex
 Female14553 3202.7225153 2984.711.72 (1.40–2.11)1.32 (1.07–1.62)
 Male26055 5274.6830651 2655.971.28 (1.08–1.51)1.06 (0.89–1.25)
Stratified by age, yr
 ≤ 30719 8850.35928 1770.320.87 (0.32–2.33)0.84 (0.31–2.27)
 31–6018376 7092.3919354 1863.561.51 (1.23–1.85)1.48 (1.21–1.82)
 > 6021512 25217.5535522 20015.990.90 (0.76–1.07)0.99 (0.83–1.17)
Comorbidity
 No21598 6542.1836093 6403.841.79 (1.51–2.12)1.31 (1.10–1.56)
 Yes19010 19318.6419710 92418.030.96 (0.78–1.17)0.91 (0.75–1.12)
  • Note: CI = confidence interval, HR = hazard ratio, PY = person-years.

  • * Incidence rate, per 1000 person-years.

  • Adjusted for sex, age, total days of admission and comorbidity in Cox proportional hazards regression.