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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