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Table 4 Effect of age on performance of opportunistic mammogram screening

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

  Less than 50 years old 50 years and above All age groups P value
Number 484 (25 %) 1454 (75 %) 1938  
Cancer detection rate 0.20 % 0.62 % 0.52 % 0.2
Dense breasts 22.5 % 12.4 % 15 % 0.00*
Moderately dense breasts 66.3 % 60.5 % 62.4 %
Adjunct ultrasound done 42.7 % 28.1 % 31.7 % 0.00*
BIRADS 3–5 (abnormal mammogram) 40 (8.2 %) 93 (6.3 %) 133 (6.8 %) 0.2
BIRADS 4–5 (suspicious mammogram) 10 (2.1 %) 30 (2.1 %) 40 (2.1 %)
Biopsy rate 3.7 % 1.8 % 2.3 % 0.028*
PPV for abnormal mammogram 2.5 % 9.6 % 7.5 % 0.1
PPV for suspicious mammogram 10 % 30 % 25 % 0.2
PPV for biopsies 5.5 % 34.6 % 22.7 % 0.01*
  1. *Significant