BRCA1 and ovarian cancer: Among 79 participants that had breast and/or ovarian cancer, the total carrier frequency was 6.3% (1 in 16) and for BRCA1 only was 5.1% (1 in 20); no mutation was identified in BRCA2. This frequency of BRCA mutation carriers is relatively low compared to 12.6% in Greece, Romania and Turkey (22) and 27.0% in India (23) but comparable to 5.5% in the Han Chinese (21) and 4.7% in the Malaysian (24).