Table 2 a Descriptive statistics of breast percent density quintiles b Descriptive statistics of absolute dense area quintiles
Quintile | Women (n) | PD (%) | BI-RADS Density category (mean) | Age in years (mean) | No previous screening n (%) | Premenopausal n (%) |
|---|---|---|---|---|---|---|
a | ||||||
PD 1 | 2946 | < 13.37% | 1.5 | 62 | 154/2946 (5.2%) | 619/2946 (21.0%) |
PD 2 | 2946 | 13.37–18.40% | 1.9 | 60 | 199/2946 (6.8%) | 904/2946 (30.7%) |
PD 3 | 2946 | 18.40–26.12% | 2.4 | 58 | 255/2946 (8.7%) | 1127/2946 (38.3%) |
PD 4 | 2946 | 26.12–40.98% | 2.8 | 56 | 368/2946 (12.5%) | 1500/2946 (50.9%) |
PD 5 | 2946 | > 40.98% | 3.3 | 50 | 523/2946 (17.8%) | 2210/2946 (75.0%) |
Quintile | Women (n) | DA (cm2) | BI-RADS Density category (mean) | Age in years (mean) | No previous screening n (%) | Premenopausal n (%) |
|---|---|---|---|---|---|---|
b | ||||||
DA 1 | 2946 | < 22.86 cm2 | 1.7 | 62 | 178/2946 (6.0%) | 649/2946 (22.0%) |
DA 2 | 2946 | 22.86–29.25 cm2 | 2.0 | 60 | 205/2946 (7.0%) | 892/2946 (30.3%) |
DA 3 | 2947 | 29.25–37.67 cm2 | 2.3 | 58 | 265/2947 (9.0%) | 1220/2947 (41.4%) |
DA 4 | 2945 | 37.67–50.95 cm2 | 2.7 | 55 | 361/2945 (12.3%) | 1574/2945 (53.5%) |
DA 5 | 2946 | > 50.95 cm2 | 3.1 | 52 | 490/2946 (16.6%) | 2025/2946 (68.7%) |