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Table 1 Clinical and demographic profile of case and control groups

From: Evaluation of volumetric breast density as a risk factor for breast carcinoma in pre- and postmenopausal women, its association with hormone receptor status and breast carcinoma subtypes defined by histology and tumor markers

Variables

Cases (n = 185)

Controls (n = 244)

Menopausal status-

  

 Premenopausal

79

109

 postmenopausal

106

135

Age (mean + SD)

50.3 + 11.02 years

48.7 + 10.1 years

Age at menarche (mean + SD)

13.4 + 0.76 years

13.4 + 0.92 years

Age at first childbirth (mean + SD)

20.7 + 5.97 years

20.9 + 6.7 years

Parity

  

 Nulliparous

11

16

 Parous

174

228

Exclusive breast feeding

  

 Present

148

196

 Absent

37

48