Clinical Study
Are Both Ultrasonography and Mammography Necessary for Cancer Investigation of Breast Lumps in Resource-Limited Countries?
Table 2
General characteristics of patients (3069 subjects, 3129 lumps).
| Characteristics | Malignant | Benign | value | mean | (SD) | mean | (SD) |
| Age (years) | 53.2 | (11.6) | 43.1 | (12.0) | <0.001 | BMI (kg/m2) | 23.7 | (6.2) | 22.7 | (2.2) | 0.003 | Duration (month) | 4.0 | (9.9) | 4.4 | (14.0) | <0.001 | Size (cm) | 3.1 | (1.9) | 1.6 | (1.1) | <0.001 | Side (, %) | | | | | | Right | 419 | 49.1 | 1,102 | 48.4 | 0.779 | Left | 435 | 50.9 | 1,173 | 51.6 | | Quadrant (, %) | | | | | | Upper outer | 467 | 54.7 | 1,157 | 50.9 | 0.121 | Upper inner | 188 | 22.0 | 556 | 24.4 | | Subareolar | 55 | 6.5 | 145 | 6.4 | | Lower outer | 95 | 11.1 | 239 | 10.5 | | Lower inner | 49 | 5.7 | 178 | 7.8 | | Clinical manifestations (, %) | | | | | | Fixed lump | 346 | 47.1 | 40 | 2.5 | <0.001 | Retracted skin | 30 | 4.5 | 9 | 0.7 | <0.001 | Nipple discharge | 19 | 2.8 | 41 | 2.7 | 1.000 | Rugged edge | 74 | 10.9 | 141 | 10.3 | 0.702 | Wound/ulcer | 13 | 2.0 | 26 | 2.1 | 1.000 |
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