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Table 4 Paired analysis of atopy to allergens among cases and healthy sibling controls

From: Genetic, familial and environmental correlates of asthma among early adolescents in Sri Lanka: a case control study

  Controls (%)   Unadjusted odds ratio (95% CI)
Cases (%) Positive Negative Total
Blomia     
Positive 4 (14.8) 23 (85.2) 27 (100.0) OR = 11.5 (2.7- 48.7)
$Negative 2 (6.1) 31 (93.9) 33 (100.0)  
Total 6 (10.0) 54 (90.0) 60 (100.0)  
House dust mite     
Positive 3 (10.3) 26 (89.7) 29 (100.0) OR = 13.0 (3.1-54.7)
$Negative 2 (6.5) 29 (93.5) 31 (100.0)  
Total 5 (8.3) 55 (91.7) 60 (100.0)  
Cockroach     
Positive 4 (11.1) 32 (88.9) 36 (100.0) OR = 5.3 (2.2-12.7)
$Negative 6 (25.0) 18 (75.0) 24 (100.0)  
Total 10 (16.7) 50 (83.3) 60 (100.0)  
  1. N = 60 *Significant at p < 0.05 level (2 tailed) $-reference category.