Table 2.
Descriptive statistics comparing lesion size and uptake factor (X) according to breast imaging reporting and data system (BI-RADS)® categories, rating of the lesions as malignant or benign and grading
| Number of lesions | n (%) | Lesion sizea |
Uptake factor |
|---|---|---|---|
| Mean ± CI | Mean ± CI | ||
| Total | 92 | 18.27 ± 2.23 | 3.98 ± 0.52 |
| Malignant | 67 (72.8) | 18.42 ± 2.30 | 4.27b ± 0.64 |
| Benign | 25 (27.2) | 17.88 ± 5.51 | 2.37b ± 0.18 |
| BI-RADS IV | 35 (38.0) | 16.49 ± 4.04 | 2.43c ± 0.15 |
| BI-RADS V | 57 (62.0) | 19.39 ± 2.60 | 4.50c ± 0.72 |
| G1 level | 8 (12.3) | 18.00 ± 6.20 | 3.96 ± 1.25 |
| G2 level | 45 (69.2) | 17.73 ± 3.04 | 3.98 ± 0.69 |
| G3 level | 12 (18.5) | 20.36 ± 3.80 | 5.63 ± 2.14 |
CI, confidence interval; levels: G1, well differentiated; G2, moderately differentiated; G3, undifferentiated.
a
Based on 91 cases, as 1 outlier with a lesion size of 120 mm has been excluded.
b
Significant mean difference between benign and malignant (Welch two-sample t-test, t = −5.094, degrees of freedom (df) = 68.956, p = 0.000; CI, −2.87 to −1.29).
c
Significant mean difference between BI-RADS IV and BI-RADS V cases (Welch two-sample t-test, t = −5.254, df = 59.545, p = 0.000; CI, −2.64 to −1.15).