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Table 1 Average (standard deviation) and percentage of variable categories among dengue fever cases and controls, Campinas, 2007

From: Spatial distribution of the risk of dengue fever in southeast Brazil, 2006-2007

Variable Cases (n = 538) Controls (n = 727) Total (n = 1265)
Age, mean years (SD) 40.8 (13.9) 45.6 (15.4) 43.6 (14.9)
   Sex:    
   Male 45% 44.8% 44.9%
   Female 55% 55.2% 55.1%
Education level, head of household, mean years of study (SD) 6.7 (4.1) 7.9 (4.5) 7.4 (4.4)
Stays home during the day:    
   Yes 36.6% 49.9% 44.3%
   No 63.4% 50.1% 55.7%
Has had dengue fever:    
   Yes 2.6% 2.7% 2.7%
   No 97.4% 97.3% 97.3%
Water supply:    
   Centralized 92.6% 98.2% 95.8%
   Well, Truck or "Improvised" 7.4% 1.8% 4.2%
Water shortage:    
   Yes 6.1% 5.5% 5.8%
   No 77.5% 77.3% 77.4%
   Sometimes 16.4% 17.2% 16.8%
Water storage:    
   Yes 14.1% 3.6% 8.1%
   No 85.9% 96.4% 91.9%
Garbage around the house:    
   Yes 33.5% 15.7% 23.2%
   No 66.5% 84.3% 76.8%
Garbage collection (times per week):    
   ≤2 77.7% 95.2% 87.7%
   >2 22.3% 4.8% 12.3%
Flood:    
   Yes 27.5% 7.3% 15.9%
   No 72.5% 92.7% 84.1%
Mosquito bites during the day:    
   Yes 67.8% 58.1% 62.2%
   No 32.2% 41.9% 37.8%
Basic sanitation:    
   Centralized 56.9% 81.8% 71.2%
   Cesspool 18.8% 13.3% 15.7%
   Open air 24.3% 4.8% 13.1%
Presence of breeding sites:    4
   Yes 61.9% 37.3% 7.7%
   No 38.1% 62.7% 52.3%
Number of breeding sites:    
   0 38.1% 62.7% 52.3%
   1 to 10 31.4% 18.6% 24.0%
   >10 30.5% 18.7% 23.7%
Presence of Larvae:    
   Yes 1.5% 1.4% 1.4%
   No 98.5% 98.6% 98.6%
Assessment of Larvae Densitya, mean (SD) 1.6 (0.8) 0.9 (0.9) 1.2 (0.9)
  1. a Assessment of Larvae Density = number of positive breeding sites per 100 domiciles