TABLE 2.
Rate ratio (RR) and 95% confidence interval (in parentheses) of breast cancer incidence by BI‐RADS density code at first screen in recruitment period, Capital Region, Denmark, 2012 to 2020, by age at recruitment
| BI‐RADS density at time of recruitment | ||||
|---|---|---|---|---|
| Age at recruitment | 2 | 3 | 4 | 3 + 4 |
| 50‐54 y | ||||
| Crude RR | 1.77 (1.46‐2.15) | 2.77 (2.30‐3.34) | 3.26 (2.58‐4.12) | 2.86 (2.39‐3.43) |
| Age‐adjusted a RR | 1.77 (1.46‐2.14) | 2.76 (2.29‐3.33) | 3.19 (2.52‐4.03) | 2.85 (2.37‐3.41) |
| 55‐59 y | ||||
| Crude RR | 1.54 (1.29‐1.84) | 2.14 (1.78‐2.58) | 2.21 (1.59‐3.08) | 2.15 (1.79‐2.58) |
| Age‐adjusted a RR | 1.53 (1.28‐1.83) | 2.13 (1.77‐2.57) | 2.21 (1.59‐3.07) | 2.14 (1.79‐2.57) |
| 60‐64 y | ||||
| Crude RR | 1.50 (1.29‐1.74) | 1.77 (1.49‐2.09) | 2.24 (1.63‐3.07) | 1.82 (1.55‐2.14) |
| Age adjusted a RR | 1.51 (1.30‐1.75) | 1.77 (1.50‐2.10) | 2.24 (1.64‐3.07) | 1.83 (1.56‐2.15) |
| 65‐69 y | ||||
| Crude RR | 2.03 (1.75‐2.34) | 1.95 (1.64‐2.32) | 1.78 (1.22‐2.60) | 1.93 (1.63‐2.28) |
| Age adjusted a RR | 2.03 (1.76‐2.34) | 1.94 (1.64‐2.31) | 1.76 (1.21‐2.57) | 1.92 (1.63‐2.27) |
| Total 50‐69 y | ||||
| Crude RR | 1.64 (1.51‐1.78) | 1.95 (1.79‐2.13) | 2.12 (1.84‐2.43) | 1.97 (1.82‐2.15) |
| Age adjusted a RR | 1.69 (1.56‐1.84) | 2.06 (1.89‐2.25) | 2.37 (2.05‐2.74) | 2.13 (1.96‐2.32) |
| Total 50‐64 y | ||||
| Crude RR | 1.52 (1.38‐1.68) | 2.01 (1.82‐2.23) | 2.26 (1.94‐2.63) | 2.05 (1.86‐2.26) |
| Age adjusted a RR | 1.55 (1.40‐1.71) | 2.11 (1.91‐2.33) | 2.46 (2.11‐2.87) | 2.18 (1.98‐2.40) |
Note: Baseline = BI‐RADS density 1.
a
Adjusted by running age in 5‐year age groups.