Table 4.

Expected and actual HLA phenotypic frequencies by treatment arm and HLA group.

HLA group	Vaccine arm		Placebo arm
	Expected	Actual	Expected	Actual
Protective	30% (22/73)	44% (32/73)	31% (11/37)	16% (6/37)
Neutral	62% (45/73)	49% (36/73)	61% (23/37)	73% (27/37)
Unfavorable	8% (6/73)	7% (5/73)	8% (3/37)	11% (4/37)

NOTE. Expected phenotypic frequencies based on A5197 ethnic distribution and calculated from HLA alleleic frequencies of U.S.-based cohorts of European Americans and African Americans (M. Carrington personal communication), and Hispanic and Asian Americans [1, 2].