Table 1. Descriptive characteristics of eligible patients (N = 216).
| Characteristic | No. | % | |
|---|---|---|---|
| Age (years) | |||
| Median | 50 | ||
| Range | 27~79 | ||
| ≤50 | 119 | 55.1 | |
| >50 | 97 | 44.9 | |
| BMI | |||
| Median | 24.1 | ||
| Range | 17.2~33.5 | ||
| Tumor size | |||
| Tis | 16 | 7.4 | |
| T1 | 99 | 45.8 | |
| T2 | 79 | 36.6 | |
| T3 | 22 | 10.2 | |
| Tumor location | |||
| UOQ | 92 | 42.6 | |
| LOQ | 25 | 11.6 | |
| UIQ | 48 | 22.2 | |
| LIQ | 5 | 2.3 | |
| Central | 46 | 21.3 | |
| Tumor type | |||
| Ductal | 187 | 86.6 | |
| Lobular | 8 | 3.7 | |
| Mixed | 5 | 2.3 | |
| Other | 16 | 7.4 | |
| Radiotracer intensity (MBq) | |||
| Median | 36 | ||
| Radiotracer volume (mL/point) | |||
| Median | 0.5 | ||
| Intervals from injection to SLNB (h) | |||
| 2~5 | 89 | 41.2 | |
| 16~22 | 127 | 58.8 |
Abbreviations: BMI body-mass-index, UOQ upper outer quadrant, LOQ lower outer quadrant, UIQ upper inner quadrant, LIQ lower inner quadrant.