Table 5. Association between BI-RADS density measures and volumetric density in other studies. a .
| BI-RADS 1/a | BI-RADS 2/b | BI-RADS 3/c | BI-RADS 4/d | Association measures | ||
|---|---|---|---|---|---|---|
| Volpara: percent dense volume | N | Mean (SD) | ||||
| Gweon [35] | 778 | 6.1 (0.9) | 7.8 (2.3) | 14.1 (5.8) | 26.1 (5.2) | % density vs. BI-RADS (Spearman’s ρ) = 0.765; VDG vs. BI-RADS (κw) = 0.54 |
| N | Median (IQR) | |||||
| Current study | 992 | 3.6 (3.1–4.4) | 5.3 (4.3–6.8) | 10.2 (8.1–13.2) | 19.3 (15.1–23.5) | |
| Jeffreys [36] | 324 | 4 (3–5) | 6 (4–8) | 11 (8–16) | 18.9 (15–22) | |
| Seo [37] | 193 | 5 (4–8) | 9 (7–11) | 14 (12–17) | 21 (18–25) | % density vs. BI-RADS (Spearman’s ρ) = 0.754; VDG vs. BI-RADS (ICC) = 0.757 |
| Gubern-Mérida [38] | 186 | 5.66 (5–6) | 9 (8–11) | 21 (18–24) | 26.69 (24–29) | % density vs. BI-RADS (Spearman’s ρ) = 0.79; VDG vs. BI-RADS (κw) = 0.40 |
| Ko [39] | 1129 | VDG vs. BI-RADS (κ) = 0.26 | ||||
| Volpara: dense volume | N | Mean (SD) | ||||
| Gweon [35] | 778 | 33.7 (7.3) | 40.7 (13.3) | 50.7 (23.7) | 63.8 (35.4) | |
| N | Median (IQR) | |||||
| Current study | 992 | 43 (37–52) | 45 (35–57) | 66 (50–88) | 75 (50–102) | |
| Jeffreys b [36] | 324 | 38 (30–50) | 50 (40–60) | 60 (50–80) | 80 (60–120) | |
| Quantra: percent dense volume | N | Mean (SD) | ||||
| Regini [40] | 200 | 13.4 (3.6) | 16.8 (4.2) | 24.5 (7.2) | 32.8 (8.3) | % density vs. BI-RADS (Pearson’s r) = 0.99; Cut-off value BI-RADS3+4 = 21% |
| N | Median (IQR) | |||||
| Current study | 992 | 8.5 (7.6–9.9) | 11.0 (9.4–12.1) | 16.1 (14.0–19.5) | 23.1 (19.6–26.8) | |
| N | Median (range) | |||||
| Ciatto c [41] | 418 | 12.0 (7.0–19.0) | 17.5 (10.0–32.0) | 27.5 (16.0–47.0) | 33.0 (24.5–50.5) | Cut-off value BI-RADS3+4 = 22% |
| Quantra: dense volume | N | Median (IQR) | ||||
| Current study | 992 | 75 (56–112) | 67 (44–89) | 79 (55–110) | 63 (44–97) |
SD = standard deviation, IQR = inter-quartile range
a The results in italics were not published, but were based on estimates from the published boxplots.
b Values were rounded off.
c Also presented means, which were: 12.2 for BI-RADS 1, 18.0 for BI-RADS 2, 28.5 for BI-RADS 3, and 34.5 for BI-RADS 4.