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Table 2 Univariable and multivariable logistic regression analysis of demographic and behavioural variables for associations with laboratory confirmed influenza among ILI patients in Bali

From: Surveillance and characterisation of influenza viruses among patients with influenza-like illness in Bali, Indonesia, July 2010–June 2014

  Univariable associations with influenza positivity Multivariable associations with influenza positivity
Crude OR (95% CI) P Adjusted OR (95% CI) P
Age group (y) (ref: 0–4)
 5–14 1.59 (1.21,2.08) 0.007 1.48 (1.10,1.99) 0.04
 15–24 1.54 (1.10,2.16)   1.35 (0.94,1.96)  
 25–34 1.59 (1.09,2.32)   1.47 (0.99,2.19)  
 35–44 1.32 (0.88,1.98)   1.20 (0.78,1.83)  
 45–64 1.10 (0.73,1.66)   0.84 (0.53,1.32)  
 65+ 0.63 (0.24,1.62)   0.64 (0.24,1.67)  
Male sex 1.00 (0.81,1.23) 1 0.97 (0.78,1.20) 0.76
Pre-existing chronic respiratory condition 0.71 (0.33,1.52) 0.37  
Smoker 0.64 (0.25,1.68) 0.37  
No. of face to face contacts per day (ref: 0–4 persons)
 10–49 1.39 (1.10,1.77) 0.002 1.19 (0.93,1.54) 0.18
 50+ 1.77 (1.25,2.51)   1.41 (0.97,2.06)  
Sick contact with ILI* 1.08 (0.77,1.50) 0.67  
Recent contact with poultryT 1.33 (1.04,1.70) 0.02 1.26 (0.89,1.78) 0.20
Recent contacts with pigsT 1.40 (1.05,1.88) 0.02 1.15 (0.86,1.54) 0.35
  1. OR, Odds Ratio
  2. CI, confidence interval
  3. *Contact with another person with ILI within 14 days prior to symptom onset;
  4. TPhysical contact with live, sick or dead animals within 14 days prior to symptom onset
  5. Data in bold are statistically significant