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Table 1 Features of the study population

From: Volume of blood suctioned during vacuum-assisted breast biopsy predicts later hematoma formation

Continuous variables mean ± SD  
Age (years) 51.5 ± 10.1  
Duration of the procedure (min) 39.6 ± 14.6  
Volume of tissue excised (cm3) 6.34 ± 2.87  
Blood suctioned during the procedure (cc) 21.5 ± 36.6  
Categorical and ordinal variables N Percentage
Menopausal status   
Premenopausal 80 45.2%
Postmenopausal 97 54.8%
Histopathological diagnosis   
Benign 116 65.5%
Precursor lesions & carcinomas 61 34.5%
Hematoma   
No 161 91.0%
Yes 16 9.0%