Table 3:

Risk trends for stroke in each cohort, stratified by follow-up period and type of stroke

Type of stroke and follow-up period, moControl cohortDengue cohortCrude HR (95% CI)Adjusted HR (95% CI)
No. of eventsPYRate*No. of eventsPYRate*
Any stroke
 ≤ 21922928.2958227225.533.06 (1.82–5.13)2.49 (1.48–4.18)
 3–124211 3513.75711 2505.071.37 (0.92–2.04)1.18 (0.79–1.75)
 > 1234495 2043.6144291 0414.851.34 (1.17–1.55)1.13 (0.98–1.30)
Hemorrhagic stroke
 ≤ 2122930.441022794.3910.01 (1.28–78.17)8.72 (1.10–68.9)
 3–12811 3760.71411 3031.241.76 (0.74–4.20)1.57 (0.67–3.69)
 > 125896 5930.67492 9310.801.31 (0.93–1.85)1.17 (0.83–1.65)
Ischemic stroke
 ≤ 2822933.4929227612.743.63 (1.66–7.94)2.90 (1.35–6.26)
 3–122011 3671.762611 2822.31.31 (0.73–2.34)1.09 (0.61–1.94)
 > 1218096 0111.8725891 9542.811.51 (1.24–1.82)1.21 (1.00–1.47)
  • Note: CI = confidence interval, HR = hazard ratio, PY = person-years.

  • * Incidence rate, per 1000 person-years.

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