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Table 2 Demographics and performance of screening and diagnostic mammogram

From: Opportunistic mammography screening provides effective detection rates in a limited resource healthcare system

  Screening mammogram Diagnostic mammogram
Opportunistic screening mammogram Targeted screening mammogram
No % No % No %
Mean age (years) 55.6 56.4 54.2
Race       
Chinese 946 48.8 130 54.2 121 38.8
Malays 428 22.1 63 26.3 71 22.8
Indians 529 27.3 43 17.9 115 36.9
Others 35 1.8 4 1.7 5 1.6
Total 1938 100 240 100 312 100
Cancer detection rate (invasive and in-situ) 0.52 1.25 26.0 %
Invasive carcinoma 8 2 79
DCIS 2 (20 %) 1 (33.3 %) 2 (2.5 %)
No of biopsies 44 13 149
Biopsy rate 2.3 % 5.4 % 47.8 %
PPV for abnormal mammogram (BIRADS 3–5) 7.5 % 13 % 63.4 %
PPV for suspicious mammogram (BIRADS 4–5) 25 % 25 % 71.7 %
PPV for biopsies 22.7 % 23 % 54.3 %