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Table 1 Baseline Characteristics of Children with Asthma in Costa Rica and White Children with Asthma in CAMP

From: Polymorphisms in IL12A and cockroach allergy in children with asthma

Variable Costa Rica CAMP
  N = 417 N = 503
Male gender (n, %) 260 (62.4) 312 (62.0)
Age in years (median, interquartile range) 8.7 (7.7–10.4) 8.6 (7.0–10.5)
STR to B. germanica (n, %) 220 (53.0) 130 (25.8)
STR to P. americana (n, %) 228 (54.9) 108 (21.5)
STR to D. pteronyssinus (%) 326 (79.0) 226 (45.0)
Positive IgE to B. germanica (n, %) 174 (41.7)  
Positive IgE to D. pteronyssinus (n, %) 319 (76.5)  
Total serum IgE, IU/ml (median, interquartile range) 414 (117–962) 399 (159–1066)
  1. STR = skin test reactivity.
  2. In Costa Rica, a positive IgE to either B. germanica or D. pteronyssinus was defined as a value >= 0.35 IU/ml. Allergen-specific IgE was not measured in CAMP.