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Table 3 Co-occurring food allergies amongst 961 patients, showing most frequent food groups and the observed/expected numbers of patients with each allergy from 2 × 2 cross-tabulations.

From: Referrals to a regional allergy clinic - an eleven year audit

  nuts sea dairy fruit egg grain latex
nuts N = 223       
seafood 10/16.5 N = 71      
dairy 8/6.5 6/2.1 N = 28     
fruit 22/16.2 6/5.2 7/2.0 N = 70    
egg 15/8.6 6/2.7 13/1.1 6/2.7 N = 37   
grain 6/5.6 2/1.8 3/0.7 3/1.7 4/0.9 N = 24  
latex 7/15.3 5/4.9 6/1.9 15/4.8 5/2.5 3/1.6 N = 66
  1. The two bold cells (egg-dairy) and (latex-fruit) show where there is more co-occurrence than you would expect by chance (based on Fisher exact test and p < 0.0024).
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