Table 3.
Tumour visibility on DBT + FFDM and Imaging variables: Univariate analysis
| Imaging variables | Total (n = 106) | Tumour visibility on DBT + FFDM | |||
| 1 (n = 22) | 2 (n = 11) | 3 (n = 73) | P-value a | ||
| Breast composition | |||||
| a | 22 (20.8) | 0 (0) | 1 (9.1) | 21 (28.8) | <0.001 |
| b | 18 (17.0) | 0 (0) | 1 (9.1) | 17 (23.3) | |
| c | 44 (41.5) | 5 (22.7) | 9 (81.8) | 30 (41.1) | |
| d | 22 (20.8) | 17 (77.3) | 0 (0) | 5 (6.8) | |
| Breast thickness (mm) b | |||||
| Mean ± SD | 45.8 ± 11.0 (range 11.0–67.8) | 41.2 ± 11.6 | 51.2 ± 9.2 | 46.4 ± 10.7 | 0.211 |
| Mass shape | |||||
| Oval or round | 24 (22.6) | 2 (9.1) | 3 (27.3) | 19 (26.0) | 0.232 |
| Irregular | 82 (77.4) | 20 (90.9) | 8 (72.7) | 54 (74.0) | |
| Mass margin | |||||
| Circumscribed | 5 (4.7) | 0 (0) | 2 (18.2) | 3 (4.1) | 0.061 |
| Not-circumscribed | 101 (95.3) | 22 (100) | 9 (81.9) | 70 (95.9) | |
| Mass density | |||||
| Iso | 37 (34.9) | 14 (63.6) | 3 (27.3) | 20 (27.4) | 0.006 |
| Hyper | 69 (65.1) | 8 (36.4) | 8 (72.7) | 53 (72.6) | |
DBT, digital breast tomosynthesis; FFDM, full-field digital mammography; SD, standard deviation.
Data are numbers of cases, and data in parentheses are percentages.
a
P-values were obtained by the Pearson’s Chi-square test or Fisher’s exact test for categorical variables and Mann-Whitney test for continuous variables. P-value < 0.050 was considered to indicate a statistically significant difference.
b
Automatically measured at the time of mammographic image acquisition.