Table 1.
Baseline characteristics of the study population
| Characteristicsa | All (N=902) | NGT (N=601) | IGT (N=301) | Non-converters (N=757) | Converters (N=145) |
|---|---|---|---|---|---|
|
| |||||
| Age (years) | 54.6 (8.4) | 53.7 (8.5) | 56.5 (8.0) | 54.4 (8.5) | 55.9 (7.8) |
|
| |||||
| Gender (Females) | 56.5% | 53.7% | 62.1% | 56.0% | 59.3% |
|
| |||||
| Ethnicity: Non-Hispanic White | 40.0% | 40.8% | 38.5% | 40.6% | 37.2% |
| African American | 26.5% | 25.8% | 27.9% | 26.2% | 28.3% |
| Hispanic | 33.5% | 33.4% | 33.6% | 33.3% | 34.5% |
|
| |||||
| NEFA–Fast (μmol/L) | 468.9 (186.4) | 429.2 (171.5) | 548.2 (190.0) | 464.6 (185.0) | 491.4 (192.8) |
|
| |||||
| 2-hour glucose (mg/dl) | 124.8 (33.8) | 105.5 (21.0) | 163.4 (17.2) | 119.4 (31.5) | 153.2 (30.8) |
|
| |||||
| Fasting plasma glucose, FPG (mg/dl) | 98.5 (11.2) | 95.4 (9.9) | 104.7 (11.0) | 96.9 (10.3) | 106.8 (12.0) |
|
| |||||
| BMI (kg/m2) | 28.4 (5.6) | 27.4 (4.8) | 30.5 (6.5) | 28.0 (5.3) | 31.2 (6.4) |
|
| |||||
| Waist-to-hip ratio | 0.86 (0.09) | 0.85 (0.08) | 0.87 (0.09) | 0.85 (0.09) | 0.88 (0.08) |
|
| |||||
| Waist (cm) | 90.3 (12.7) | 88.0 (11.5) | 94.9 (13.8) | 89.3 (12.4) | 95.7 (13.1) |
|
| |||||
| Weight (kg) | 79.8 (16.9) | 77.6 (15.5) | 84.2 (18.7) | 78.6 (16.3) | 85.8 (18.9) |
|
| |||||
| Fasting insulin (pmol/L) | 94.1 (89.1) | 82.7 (58.1) | 116.7 (127.7) | 86.2 (66.9) | 134.9 (155.5) |
|
| |||||
| Acute insulin response, AIR (pmol.ml−1. min−1 | 489.6 (489.4) | 555.0 (524.1) | 359.0 (380.0) | 529.5 (506.8) | 277.4 (308.0) |
|
| |||||
| Insulin sensitivity, SI (×10−4 min−1.μU−1.ml−1) | 2.2 (2.0) | 2.6 (2.2) | 1.3 (1.2) | 2.4 (2.1) | 1.3 (1.6) |
a
Mean (SD) presented for continuous parameters;
% presented for categorical characteristics