Table 1

Clinical characteristics of the IS and IR groups

IS (n = 64)IR (n = 79)P
M value (mg · min−1 · kg−1)7.78 ± 0.242.71 ± 0.08***
Age (years)37 ± 140 ± 1ns
Sex (% men)6466ns
Ethnicity (%)ns
 Black14.417.7
 Hispanic white70.377.2
 Non-Hispanic white10.92.5
Former smoker (%)10.919.0ns
Annual income ($)13.5 ± 1.814.6 ± 2.1ns
Prediabetes (%)2047***
Education (years)13.1 ± 0.313.4 ± 0.3ns
BMI (kg · m−2)26.3 ± 0.431.2 ± 0.5***
Waist girth (cm)88 ± 1104 ± 1***
VAT (kg)2.6 ± 0.24.4 ± 0.2***
SAT (kg)5.6 ± 0.39.3 ± 0.4***
Systolic/diastolic blood pressure (mmHg)114 ± 2/78 ± 2120 ± 2/84 ± 1**
Triglycerides (mmol/L)1.2 ± 0.11.9 ± 0.1***
LDL-C (mmol/L)3.0 ± 0.13.2 ± 0.1ns
HDL-C (mmol/L)1.3 ± 0.041.1 ± 0.03***
hs-CRP (mg/L)1.4 ± 0.23.7 ± 0.5*
Fasting FFA (µmol/L)443 ± 17533 ± 21**
HbA1c (%) (mmol/mol)5.3 ± 0.04 
(34 ± 1)5.5 ± 0.05 
(37 ± 1)*
  • Data are means ± SE unless otherwise indicated. HDL-C, HDL cholesterol; LDL-C, LDL cholesterol; ns, not significant by Mann-Whitney test; SAT, subcutaneous adipose tissue; VAT, visceral adipose tissue.

  • †χ2 or t test for group differences.

  • ‡In thousands.

  • *P < 0.05;

  • **P < 0.01;

  • ***P < 0.001.