Comparison of Characteristics of Breast Cancer Detected through Different Imaging Modalities in a Large Cohort of Hong Kong Chinese Women: Implication of Imaging Choice on Upcoming Local Screening Program

Table 1

Characteristics of study population.

	N (total = 14613)	%
Age
<40	1233	8.4
40–49	4602	31.5
50–59	4756	32.5
60–69	2758	18.9
≥70	1094	7.5
Unknown	170	1.2
Cancer stage
Stage 0	1752	12.0
Stage I	4606	31.5
Stage II	5455	37.3
Stage III	2042	14.0
Stage IV	294	2.0
Not classified	464	3.2
Mode of presentation
Symptomatic	11848	81.1
Asymptomatic	2191	15.0
Unknown	574	3.9
Mode of cancer detection
MMG+/USG+	12131	83.0
MMG+/USG−	335	2.3
MMG−/USG+	1311	9.0
MMG−/USG−	836	5.7