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).

CharacteristicsMalignantBenign 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 ( , %)
 Right41949.11,10248.40.779
 Left43550.91,17351.6
Quadrant ( , %)
 Upper outer46754.71,15750.90.121
 Upper inner18822.055624.4
 Subareolar556.51456.4
 Lower outer9511.123910.5
 Lower inner495.71787.8
Clinical manifestations ( , %)
 Fixed lump34647.1402.5<0.001
 Retracted skin304.590.7<0.001
 Nipple discharge192.8412.71.000
 Rugged edge7410.914110.30.702
 Wound/ulcer132.0262.11.000