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Table 1.

Baseline Characteristics of the 458 Patients

Median or %IQRMissing
Age at diagnosis (y) 59.6 51.0-66.5 — 
Height (cm) 165 161-170 
Weight (kg) 68.0 60.5-76.0 
Body mass index (kg/m224.5 22.4-27.6 
Waist-to-hip ratio 0.83 0.78-0.88 
Total breast volume (cm31,000 688-1,575 
Age at menarche (y) 13 12-14 
Premenopausal (%) 23  
Age at menopause (y) 50 47-52 123 
Age at first full-term pregnancy* (y) 25 22-28 77 
Parity 1-3 
Ever oral contraceptive use (%) 69  — 
Ever hormone replacement therapy use (%) 45  — 
Abstainer of alcohol (%) 12  
Current smoker (%) 22  — 
Daily coffee consumption (cups) (%)   
    None 10   
    1   
    2 19   
    3 24   
    4 23   
    5   
    ≥6 10   
First-degree relative with breast cancer (%) 19  13 
First- or second-degree relative with breast cancer (%) 33  16 
Median or %IQRMissing
Age at diagnosis (y) 59.6 51.0-66.5 — 
Height (cm) 165 161-170 
Weight (kg) 68.0 60.5-76.0 
Body mass index (kg/m224.5 22.4-27.6 
Waist-to-hip ratio 0.83 0.78-0.88 
Total breast volume (cm31,000 688-1,575 
Age at menarche (y) 13 12-14 
Premenopausal (%) 23  
Age at menopause (y) 50 47-52 123 
Age at first full-term pregnancy* (y) 25 22-28 77 
Parity 1-3 
Ever oral contraceptive use (%) 69  — 
Ever hormone replacement therapy use (%) 45  — 
Abstainer of alcohol (%) 12  
Current smoker (%) 22  — 
Daily coffee consumption (cups) (%)   
    None 10   
    1   
    2 19   
    3 24   
    4 23   
    5   
    ≥6 10   
First-degree relative with breast cancer (%) 19  13 
First- or second-degree relative with breast cancer (%) 33  16 

Abbreviation: IQR, interquartile range.

*

Among parous women only.

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