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Table 2.

Distribution of NYCP and CHOP European Subjects

Presumed EthnicityA PCA RangeB Percent of SamplesC
PC1 PC2 NYCP CHOP
Ashkenazi 0.030, 0.040 0.020, 0.040 13.0% 4.5%
North European −0.016, −0.005 −0.010, 0.015 59.7% 45.4%
Italian/Greek −0.002, 0.025 −0.035, −0.010 13.4% 16.7%
Irish −0.016, −0.010 −0.010, 0.0001 14.0% 3.8%
A

Presumed ethnicity corresponding to the PCA results. The Irish group is a subset of the North European larger group.

B

The coordinate range for PC1 and PC2 for four different groups of subjects. The first value indicates the lower boundary and the second value the upper boundary for each PC range.

C

The percent of subjects is shown for NYCP (1832 subjects) and CHOP (1487 subjects).