Skip to main content

Table 2 Multilevel logistic regression analysis of dengue epidemiological risk factors

From: Epidemiological risk factors for adult dengue in Singapore: an 8-year nested test negative case control study

Variable Category Full model Stepwise model
   OR 95 % CI AOR 95%CI
Gender Female 1.00   1.00  
Male 1.05 0.72 to 1.53 0.95 0.70 to 1.31
Age Group < 21 1.00   1.00  
21 to 30 2.56 1.24 to 5.29 2.12 1.11 to 4.05
31 to 40 3.01 1.39 to 6.53 2.28 1.16 to 4.47
41 to 50 2.53 1.17 to 5.47 1.83 0.92 to 3.62
51 to 60 2.35 1.04 to 5.34 1.62 0.79 to 3.31
61 and above 1.68 0.63 to 4.51 1.18 0.51 to 2.72
Ethnicity Chinese 1.00   1.00  
Malay 0.47 0.28 to 0.79 0.57 0.35 to 0.91
Indian 0.69 0.43 to 1.12 0.73 0.47 to 1.14
Other 0.63 0.33 to 1.22 0.82 0.47 to 1.44
Home address region South-west 1.00   1.00  
Central 0.63 0.28 to 1.39 0.65 0.42 to 1.02
North-west 0.38 0.15 to 0.98 0.50 0.29 to 0.86
North-east 0.74 0.32 to 1.77 1.20 0.71 to 2.03
South-east 1.21 0.36 to 4.12 1.25 0.44 to 3.54
Housing type Multistorey public flats 1.00   1.00  
Multistorey private flats 0.80 0.37 to 1.73 0.73 0.35 to 1.52
Landed houses 0.99 0.28 to 3.55 1.44 0.82 to 2.55
Foreign workers dormitory/hostel 3.03 1.51 to 6.06 3.25 1.84 to 5.73
Country of origin Singapore 1.00    
Others 0.92 0.61 to 1.38   
Healthcare recruitment site A 1.00    
B 4.27 1.15 to 15.95   
C 0.65 0.24 to 1.74   
D 3.60 1.52 to 8.54   
E 1.61 0.69 to 3.76   
F 2.38 1.08 to 5.26   
Self-reported history of past dengue infection No 1.00    
Yes 0.63 0.28 to 1.41   
Medical history (Diabetes/Hypertension/HD/Malignancy/Steroid treatment) No 1.00    
Yes 0.58 0.34 to 0.99   
Dwelling floor level Level 1 1.00    
Every 1 level up 0.95 0.91 to 0.99   
Travel history No 1.00    
yes 0.87 0.55 to 1.37   
Type of employment (Indoor/Outdoor/Both) and Primary mode of transportation to work (Public-train or bus/Private-taxi or car/Walking) Unemployed 1.00    
Indoor & Public 0.51 0.31 to 0.82   
Indoor & Private 0.87 0.42 to 1.80   
Indoor & Walking 0.70 0.28 to 1.78   
Outdoor & Public 0.70 0.35 to 1.41   
Outdoor & Private 1.41 0.63 to 3.11   
Outdoor & Walking 0.68 0.24 to 1.91   
Both & Public 0.68 0.38 to 1.21   
Both & Private 0.43 0.19 to 0.98   
Both & Walking 0.81 0.23 to 2.88   
Self-reported history of mosquito bite No 1.00    
Yes 0.91 0.62 to 1.35   
Self-reported history of household dengue No 1.00    
Yes 1.02 0.23 to 4.52   
Self-reported history of household fever No 1.00    
Yes 1.22 0.83 to 1.80   
  1. Figures in bold are statistically significant, P < 0.05
  2. OR Odds Ratio, AOR Adjusted Odds Ratio, CI Confidence Interval