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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.