Table 1.

Physiologic and demographic characteristics of HEAL Study participants stratified by ethnicity (N = 710)

All (N = 710)Non-Hispanic White (n = 460)Black (n = 175)Hispanic White (n = 75)
Age, y (mean ± SD)55.1 ± 10.256.9 ± 10.250.4 ± 7.7*55.0 ±11.9
Weight, kg (mean ± SD)75.0 ± 18.372.1 ± 15.985.5 ± 21.8*68.5 ± 12.9
Height, cm (mean ± SD)164.5 ± 7.1165.1 ± 6.7165.2 ± 7.5*159.7 ± 7.1,
BMI, kg/m2 (mean ± SD)27.7 ± 6.426.5 ± 5.631.3 ± 7.526.9 ± 4.8
Postmenopausal (%)75777269
Education (% high school graduate)949789*82,
Study site (%)
    New Mexico53660*96,
    Seattle23341*4,
    Los Angeles25099*0,
Disease stage (%)
    024262023
    I555646*64
    II-IIIA211834*13
Treatment (%)
    Surgery only31293537
    Surgery and radiation394524*36
    Any chemotherapy302641*27
Tamoxifen users (%)434637*39
Type 2 diabetes (%)9.78.512.610.7
Current smokers (%)8.98.012.0*6.7
Sports/recreational physical activity, h/wk (mean ± SD)§3.0 ± 3.93.2 ± 4.22.2 ± 3.1*3.8 ± 3.7
Sports/recreational physical activity, MET-h/wk (mean ± SD)13.4 ± 19.014.1 ± 20.210.1 ± 15.8*16.9 ± 17.2
Household physical activity, h/wk (mean ± SD)§19.3 ± 16.016.9 ± 12.524.3 ± 20.9*22.3 ± 19.2
Household physical activity, MET-h/wk (mean ± SD)51.2 ± 41.745.5 ± 33.162.9 ± 53.6*59.4 ± 50.2
C-peptide levels, ng/mL (mean ± SD)2.29 ± 1.082.29 ± 0.992.17 ± 1.312.53 ± 0.97
Leptin levels, ng/mL (mean ± SD)24.6 ± 17.821.5 ± 15.234.0 ± 22.5*22.1 ± 12.1
IGF-I levels, ng/mL (mean ± SD)133.5 ± 58.3143.1 ± 55.0104.3 ± 51.5*143.0 ± 70.0
IGFBP-3 levels, μg/mL (mean ± SD)4.08 ± 1.04.17 ± 0.913.85 ± 1.02*4.03 ± 0.99
IGF-I:IGFBP-3 (mean ± SD)32.7 ± 11.934.3 ± 11.127.7 ± 11.8*34.9 ± 13.9
  • * P < 0.05, Black significantly different from non-Hispanic White.

  • P < 0.05, Hispanic White significantly different from non-Hispanic White.

  • P < 0.05, Hispanic White significantly different from Black.

  • § Past month physical activity assessed from interview-administered physical activity questionnaire conducted within their third year after diagnosis.