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Table 2 Risk factors of FRI

From: Risk factors for febrile respiratory illness and mono-viral infections in a semi-closed military environment: a case-control study

Characteristic Crude OR 95 % CI Adjusted ORa 95 % CI
Age 0.97 0.96 0.99 1.03 1.01 1.05
Gender: Male 0.31 0.04 2.31    
Ethnic groups
Chinese 1.00      
Malay 1.21 1.01 1.45 1.10 0.90 1.34
Indian 0.97 0.76 1.22 0.96 0.75 1.24
Others 1.42 0.96 2.11 1.39 0.92 2.11
Camp
Non-recruit camp 1    1   
Recruit camp 5.01 4.41 5.69 4.67 3.99 5.46
Pre-pdm TIV:
Yes 0.58 0.42 0.80 0.99 0.70 1.41
Post-pdm TIV:
Yes 1.56 1.35 1.80 1.42 1.21 1.66
Pdm-A(H1N1)V:
Yes 0.96 0.82 1.12 0.81 0.68 0.97
Smoking
Ex-/Current Smoker 1.03 0.91 1.18 1.31 1.13 1.52
Asthma
Yes 1.25 1.07 1.46 1.01 0.85 1.19
Heart disease
Yes 0.89 0.51 1.55    
Diabetes
Yes 1.21 0.51 2.84    
Hypertension
Yes 0.64 0.14 3.04    
Travelled to community in last 14 days:
Yes 0.76 0.38 1.53 0.84 0.40 1.77
Travelled to other camp in last 14 days:
Yes 0.39 0.33 0.47 0.87 0.71 1.06
Travelled overseas in the last 14 days:
Yes 0.74 0.54 1.01 1.08 0.77 1.52
Camp Stay & ill contacts
Stay-out & ill household member 4.59 3.16 6.67 4.96 3.39 7.24
Stay-in, none ill in bunk and at home 1.24 1.01 1.52 0.80 0.64 0.99
Stay-in, none ill in bunk & ill household member 1.63 1.14 2.33 1.17 0.80 1.70
Stay-in, ill bunkmate & none ill at home 4.46 3.66 5.42 1.75 1.39 2.20
Stay-in, ill bunkmate and household member 6.87 5.07 9.32 3.55 2.57 4.91
  1. aAdjusted for age, ethnic groups, camp, vaccination type, smoking, asthma, travel history, camp stay and ill contacts
  2. Pdm- pandemic