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Table 3 Effect of cough on being influenza positive by age, Ontario, Canada, 2011/12 and 2012/13

From: Predictors of influenza among older adults in the emergency department

Age (years) Odds ratio for influenza when cough is present (95 % CI)a
60 1.3 (0.4, 4.6)
65 2.2 (0.9, 5.7)
70 3.8 (1.8, 8.2)
75 6.7 (3.0, 14.9)
80 11.6 (4.1, 33.2)
85 20.1 (4.9, 81.9)
90 34.8 (5.8, 210.6)
  1. CI Confidence interval
  2. aOdds ratio was adjusted for all other predictors in the final model: hospital site, wheezing, feverishness, confusion, frailty, time to triage from symptom onset, exposure to person with influenza-like illness, influenza activity in the community, product term of confusion and frailty, and product term of cough and age. Cough was based on chart-review and self-report