Table 1 General characteristics and biochemical variables among the four categories of body mass index (BMI)
Variable | BMI Category (kg/m2) | |||||
|---|---|---|---|---|---|---|
All | Underweight < 18.5 | Normal 18.5 to < 25 | Overweight 25 to < 30 | Obese ≥ 30 | P for trend | |
Number (%) | 4728 (100) | 90 (1.9) | 1516 (32.1) | 2001 (42.3) | 1121 (23.7) | |
Age (years) | 42.9 ± 13.6 | 34.3 ± 14.7 | 40.0 ± 14.4 | 44.0 ± 13.1 | 45.4 ± 12.1 | < 0.001 |
Female (%) | 58.5 | 56.7 | 49.4 | 57.1 | 73.6 | < 0.001 |
Family history of diabetes (%) | 27.0 | 17.2 | 23.9 | 28.0 | 30.1 | < 0.001 |
Current cigarette smoker (%) | 11.9 | 16.7 | 15.5 | 11.3 | 7.5 | < 0.001 |
Non-smoker (%) | 81.2 | 78.9 | 77.3 | 81.0 | 87.1 | < 0.001 |
Systolic blood pressure (mmHg) | 119 ± 18 | 105 ± 13 | 114 ± 16 | 120 ± 18 | 124 ± 19 | < 0.001 |
Diastolic blood pressure (mmHg) | 78 ± 10 | 70 ± 8 | 74 ± 10 | 78 ± 10 | 82 ± 10 | < 0.001 |
Fasting plasma glucose (mmol/L) | 5.00 ± 0.54 | 4.74 ± 0.39 | 4.88 ± 0.51 | 5.03 ± 0.54 | 5.13 ± 0.56 | < 0.001 |
2-hour postchallenge plasma glucose (mmol/L) | 5.95 ± 1.64 | 4.94 ± 1.33 | 5.50 ± 1.48 | 6.07 ± 1.64 | 6.45 ± 1.68 | < 0.001 |
Triglycerides (mmol/L) | 1.88 ± 1.17 | 1.00 ± 0.50 | 1.50 ± 0.92 | 2.03 ± 1.25 | 2.21 ± 1.22 | < 0.001 |
Total cholesterols (mmol/L) | 5.44 ± 1.16 | 4.56 ± 0.94 | 5.08 ± 1.08 | 5.54 ± 1.14 | 5.80 ± 1.15 | < 0.001 |
HDL-C (mmol/L) | 1.09 ± 0.28 | 1.29 ± 0.31 | 1.13 ± 0.29 | 1.08 ± 0.28 | 1.07 ± 0.27 | < 0.001 |
LDL-C (mmol/L) | 3.49 ± 0.97 | 2.81 ± 0.86 | 3.26 ± 0.93 | 3.56 ± 0.96 | 3.72 ± 0.95 | < 0.001 |