Among women included in the analysis as ‘white’, 36 reported ethnicity other than white for their mother, father or both. After excluding these in sensitivity analyses, results were largely unchanged (data not shown). Further exclusions based on a set of ancestry-informative genetic markers (N = 76 women), or on self-reported Jewish faith (as proxy for Jewish ancestry/ethnicity) (N = 4) did not alter the results (not shown—see Materials and Methods for details).
