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Table 4 Observed distribution of genotypes at the TAS2R38 locus and presence and type of bacterial infection within the CRS patients, used for association analysis

From: TAS2R38 taste receptor gene and chronic rhinosinusitis: new data from an Italian population

  Bacterial infection
Absent Present Tot.
  Gram + Gram – and mixed flora
PAV/PAV 4 2 2 8
PAV/- 12 6 14 32
−/− 5 3 5 13
Tot. 21 11 21 53
  1. The following Π values were used to calculate the expected frequencies of each comorbidity (see Table 2): Π(Absence of bacterial infection) = 21/53 = 0.396; Π(Presence of Gram +) = 11/53 = 0.453; Π(Presence of Gram – and mixed flora) = 21/53 = 0.396
  2. Association between genotypes at the TAS2R38 locus and bacterial infection was then tested by χ 2