Table 3.

Frequency of IL-1ra genotypes in African American and Caucasian children with community-acquired pneumonia

Genotype, n (%)	Caucasian, n (%)	African American, n (%)	Combined, n (%)
A1/A1	121 (52.2)	428 (83.6)	549 (73.8)
A1/A2	83 (35.8)	50 (9.8)	133 (17.9)
A2/A2	16 (6.9)	3 (0.6)	19 (2.6)
A1/A3	6 (2.6)	9 (1.8)	15 (2.0)
A1/A4	3 (1.3)	20 (3.9)	23 (3.1)
A2/A3	3 (1.3)	0	3 (0.4)
A2/A4	0	2 (0.4)	2 (0.3)

IL-1ra genotype could not be determined in three African American patients. There were no African American or Caucasian children enrolled with the A5 allele in the IL-1ra gene.

IL-1ra, interleukin-1 receptor antagonist.