Table 2.

As Table 1, but also including all constructed pairs from triplets and quadruplets

Cancer	Number of patients	Frequency	Expected concordant pairs	Observed concordant pairs	Chi square (p)
breast	209	209/360 = 0.58	180×(0.58)2 = 60.7	63	0.09 (> 0.05)
ovarian	151	151/360 = 0.42	180×(0.42)2 = 31.7	34	0.17 (> 0.05)