Table 1 Baseline characteristics of 2705 participants of the third and fourth survey of the Tehran Lipid and Glucose Study*
Variables | Total (n = 2705) | Normal weight(n = 1604) | Overweight-obese (n = 1101) | P-value |
|---|---|---|---|---|
Demographic-anthropometric data | ||||
 Age (years) | 33.5 ± 12.2 | 30.9 ± 12.1 | 37.3 ± 11.2 |  < 0.001 |
Gender |  |  |  |  < 0.001 |
 Men n (%) | 890 (32.9) | 611 (38.1) | 278 (25.1) |  |
 Women n (%) | 1815 (67.1) | 993 (61.9) | 823 (74.9) |  |
 Body mass index (kg/m2) | 24.3 ± 3.8 | 21.8 ± 2.1 | 28.0 ± 2.6 |  < 0.001 |
 Smoking (%) | 258 (9.5) | 183 (11.4) | 75 (6.8) |  < 0.001 |
 Physical activity (MET/hour/week) | 60.6 (22.3 – 103.2) | 60.6 (23.8 – 104.4) | 60.3 (21.0 – 100.9) | 0.325 |
 Education level (> 12 years) (%) | 721 (26.5) | 446 (27.8) | 275 (25.0) | 0.100 |
 Waist(cm) | 80.3 ± 10.4 | 75.4 ± 8.1 | 87.5 ± 9.1 |  < 0.001 |
Biochemical-clinical data | ||||
  Fasting blood sugar(mg/dl) | 85.6 ± 10.2 | 84.7 ± 10.0 | 86.9 ± 10.3 |  < 0.001 |
  Triglycerides (mg/dl) | 91.3 ± 34.4 | 87.5 ± 34.7 | 96.8 ± 33.2 |  < 0.001 |
  HDL- cholesterol (mg/dl) | 47.4 ± 10.2 | 46.6 ± 10.1 | 48.5 ± 10.1 |  < 0.001 |
  Systolic blood pressure (mmHg) | 104 ± 12 | 103 ± 12 | 106 ± 11 |  < 0.001 |
  Diastolic blood pressure (mmHg) | 69.0 ± 8.7 | 67.7 ± 8.8 | 70.8 ± 8.3 |  < 0.001 |
Insulin Scores | ||||
  EDIH | 0.17 (0.8 – 0.32) | 0.18 (0.09 – 0.34) | 0.16 (0.07 – 0.28) |  < 0.001 |
  ELIH | 1.23 ± 0.26 | 1.10 ± 0.21 | 1.46 ± 0.22 |  < 0.001 |