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Table 1 Description of the study population (n = 737)

From: Intact and total insulin-like growth factor-binding protein-3 (IGFBP-3) levels in relation to breast cancer risk factors: a cross-sectional study

  Mean ± SD or Percentage
Growth factors  
   Total IGF-I, ng/mL 224.0 ± 63.7
   Intact IGFBP-3, ng/mL 1,044 ± 234
   Fragmented IGFBP-3, ng/mL 3,762 ± 908
   Total IGFBP-3, ng/mL 4,806 ± 910
Characteristics  
   Age at mammography, years 46.8 ± 4.6
   Body mass index, kg/m2 25.2 ± 4.5
   Waist-to-hip ratio 0.78 ± 0.06
   Alcohol intake, drinks/week 3.4 ± 3.8
   Energy intake, kilocalories/day 1,905 ± 514
   Physical activity, MET-hours/week 27.2 ± 22.2
   Parity, parous percentage 75.9
   Smoking, current percentage 14.9
Mammographic breast density  
   Percent density, percentage 42.4 ± 24.4
   Absolute density, cm2 47.0 ± 28.8
  1. IGF, insulin-like growth factor; IGFBP-3, insulin-like growth factor-binding protein-3; MET, metabolic equivalent; SD, standard deviation.