Table 1 Descriptive comparison of screening and symptomatically detected cancers
Detection mode | |||
|---|---|---|---|
Screening | Symptomatic with a negative screen in the last 2 years | Symptomatic without a negative screen in the last 2 years | |
Number of cases | 937 | 292 | 123 |
Tumour size, mm | 12.00 | 19.00 | 20.00 |
(median and quartiles) | (9.00, 18.00) | (13.75, 25.00) | (13.50, 28.00) |
Age at diagnosis | 63 | 62 | 65 |
(median and quartiles) | (58, 68) | (56.75, 67) | (61,71) |
Body mass index | 25.65 | 24.78 | 24.45 |
(median and quartiles) | (23.23, 28.26) | (22.31, 27.65) | (22.71, 27.19) |
Percentage mammographic density | 13.51 | 15.71 | 14.77 |
(median and quartiles) | (6.33, 23.72) | (7.90, 29.44) | (9.04, 28.83) |
Standardised total breast area | 0.05 | −0.32 | −0.15 |
(median and quartiles) | (−0.67, 0.74) | (−1.04, 0.40) | (−0.73, 0.74) |
Cases with no previous negative screening | 17 | 0 | 13 |
Cases with 1 previous negative screening | 200 | 22 | 57 |
Cases with 2 previous negative screenings | 596 | 149 | 49 |
Cases with 3 previous negative screenings | 124 | 121 | 4 |
Time since last negative screening, yearsa | 2.01 | 1.19 | 2.67 |
(median and quartiles) | (1.79, 2.13) | (0.90, 1.57) | (2.24, 3.56) |