Table 2: Estimate of HPA incompatibility probability for assessing the risk of FNAIT and PTR.

Frequency major allele (%)Heterozygosity (%)Fetomaternal incompatibilityMismatch platelet transfusion
Anti-a risk (%)Anti-b risk (%)

HPA-199.550.90<0.010.450.89
HPA-296.496.610.123.276.54
HPA-355.8152.3010.9013.7637.16
HPA-499.750.50<0.010.250.50
HPA-598.502.960.021.462.92
HPA-697.754.410.052.154.31
HPA-1553.7149.7311.5113.3537.76