TABLE 1.

Comparison of percentage density (%) and dense area (cm²) for women in China and Australia (means ± standard deviation)

	All			Premenopause			Postmenopause
	Left	Right	Average	Left	Right	Average	Left	Right	Average
Percentage density (%)
China	24.75 ± 13.46	25.22 ± 13.42	24.98 ± 12.45	28.01 ± 13.36	27.93 ± 13.64	27.97 ± 12.35	23.06 ± 13.20	23.83 ± 13.09	23.44 ± 12.22
Australia	15.23 ± 12.33	15.51 ± 12.73	15.37 ± 11.48	18.97 ± 12.64	20.58 ± 15.16	19.78 ± 12.76	14.14 ± 11.95	14.17 ± 11.62	14.16 ± 10.79
p‐values	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Dense area (cm2)
China	23.76 ± 12.21	24.06 ± 11.67	23.91 ± 10.84	26.91 ± 12.01	26.54 ± 11.44	26.73 ± 10.55	22.14 ± 12.00	22.79 ± 11.59	22.69 ± 14.94
Australia	22.01 ± 18.72	22.19 ± 18.80	22.10 ± 16.53	25.31 ± 15.63	27.04 ± 20.55	26.18 ± 15.42	20.96 ± 19.20	20.90 ± 18.11	20.93 ± 16.61
p‐values	<0.001	<0.001	<0.001	0.057	0.587	0.472	0.033	<0.001	<0.001