Table 3. Analysis of the quantitative variables as possible predictors of involvement of the remaining axillary nodes and SN false-negatives and false-positives, Mann-Whitney U test.
| Features | Remaining axillary nodes status | SN false-negatives | SN false-positives | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| None metastatic (n=12), mean (SD) | >1 metastatic LNs (n=13), mean (SD) | P | No FN (n=18), mean (SD) | FN (n=7), mean (SD) | P | No FP (n=20), mean (SD) | FP (n=5), mean (SD) | P | |||
| Age (years) | 51.66 (7.88) | 59.23 (13.93) | 0.13 | 58.85 (17.78) | 54.3 (8.9) | 0.74 | 56.45 (12.73) | 52.20 (7.39) | 0.53 | ||
| Body mass index (kg/m2) | 27.61 (6.46) | 24.52 (4.48) | 0.20 | 26.41 (5.71) | 24.95 (5.70) | 0.53 | 26.29 (5.62) | 24.85 (6.16) | 0.45 | ||
| Suspicious node US size (mm) | 14.08 (4.94) | 16.07 (7.02) | 0.61 | 14.94 (5.10) | 15.57 (8.58) | 0.83 | 14.75 (6.12) | 16.60 (6.30) | 0.45 | ||
| ER (%) | 94.08 (6.11) | 90.53 (19.08) | 0.76 | 95 (5.47) | 85.14 (25.3) | 0.70 | 91.45 (15.72) | 95.40 (4.92) | 0.81 | ||
| PR (%) | 74.58 (32.54) | 54.23 (41.45) | 0.34 | 63.27 (36.26) | 65.85 (45.58) | 0.65 | 60.15 (39.93) | 79.40 (27.75) | 0.30 | ||
| Ki67 index (%) | 16.66 (12.30) | 24.61 (13.14) | 0.06 | 17.22 (10.60) | 30 (15.27) | 0.02 | 21.25 (12.12) | 19.00 (18.16) | 0.33 | ||
| Invasive tumor size (mm) | 27.60 (29.06) | 41.27 (68.30) | 0.61 | 27.52 (26.19) | 53.20 (92.60) | 0.70 | 38.56 (58.36) | 19.32 (7.87) | 0.92 | ||
| Tumor size including DCIS (mm) | 30.50 (35.24) | 48.50 (67.87) | 0.25 | 29.65 (30.36) | 65.97 (89.76) | 0.13 | 43.99 (61.18) | 26.02 (15.52) | 0.89 | ||
| Biopsy proven LN size on the pathology report (mm) | 21.50 (5.97) | 22.15 (7.25) | 0.89 | 21.27 (6.25) | 23.28 (7.54) | 0.458 | 22.10 (7.25) | 20.80 (2.28) | 0.86 | ||
| Number of SNs excised | 1 (1.04) | 1.69 (1.49) | 0.27 | 1.55 (1.33) | 0.85 (1.21) | 0.27 | 1.25 (1.40) | 1.8 (0.83) | 0.30 | ||
| Final number of LNs excised | 14.41 (6.21) | 12.76 (4.85) | 0.61 | 13.66 (5.48) | 13.28 (5.93) | 0.79 | 13.85 (5.77) | 12.40 (4.50) | 0.76 | ||
SN, sentinel node; SD, standard deviation; LN, lymph node; FN, false negative; FP, false positive; US, ultrasound; ER, estrogen receptor; PR, progesterone receptor; DCIS, ductal carcinoma in situ.