Table 3.

Correlation analyses between clinicopathological factors and total length of copy number aberrations in breast cancers.

	Mean total length of copy number aberrations (bp)
Clinical factors	All cases (n = 28)		A-bomb survivors (n = 15)
	r*	P-value*	r*	P-value*
Age at the time of diagnosis	-0.37	0.055	-0.59	0.021
Tumor size (cm)	0.042	0.83	-0.25	0.37
Storage time (years)	0.35	0.064	0.49	0.067
DLRSpread	-0.40	0.034	-0.38	0.16
Age of the time of exposure to the A-bomb**			-0.31	0.25
Exposure distance from the hypocenter (km)**			0.11	0.70
Time between age at diagnosis and exposure (year)**			-0.52	0.047

*Pearson's correlation coefficient. **Only among A-bomb survivors