Skip to main content

Table 1 Characteristics of the study population

From: Smoking and high-risk mammographic parenchymal patterns: a case-control study

  Cases Controls
  (P2+DY; (N1+P1;
Characteristics n = 203) n = 203)
Mean age (years) 59.3 59.3
Mean body mass index 25.2 27.4
Mean waist:hip ratio 2.1 2.4
Menopausal status (n)   
    Premenopausal 44 24
    Postmenopausal 148 165
    Unknown 11 14
    Mean age at menarche (years) 13.0 12.7
    Mean age at menopause (years) 47.7 47.0
Number of children (n)   
    0 31 16
    1 27 26
    2 96 82
    3 34 47
    4+ 15 29
   Unknown - 3
History of benign breast diseases (n)   
    No 188 198
    Yes 15 5
Hysterectomy (n)   
    No 141 152
    Yes 60 49
    Unknown 2 2
HRT use (n)   
    Never 106 131
    Past 22 25
    Current 73 43
    Unknown 2 4
Smoking (n)   
    Never 121 120
    Past 62 53
    Current 20 30
  1. HRT, hormone replacement therapy.