Table 4 Effect of age on performance of opportunistic mammogram screening
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* |