Table 1.
Demographic characteristics and the prevalence of MS and Its Components in Chinese female twins, aged from 20 to 60 years.
| Variables¶ | MZ (1116 pairs) |
DZ (501 pairs) |
Total (1,617 pairs) |
|---|---|---|---|
| Mean ± SD | |||
| Age, yr | 32.4±7.8 | 32.1±8.1 | 32.3±7.9 |
| Body Mass Index (BMI), kg/m2 | 22.0±2.8 | 21.8±2.7 | 21.9±2.8 |
| Waist Circumference (WC), cm | 71.8±7.7 | 71.6±7.8 | 71.7±7.7 |
| Systolic Blood Pressure (SBP), mmHg | 111.6±12.6 | 112.6±13.4 | 111.9±12.8 |
| Diastolic Blood Pressure(DBP), mmHg | 66.0±8.5 | 66.5±9.2 | 66.2±8.7 |
| Fasting Blood Glucose (FPG), mM | 4.55±0.87 | 4.58±0.85 | 4.56±0.86 |
| High Density Lipid (HDL), mM | 1.55±0.70 | 1.49±0.58 | 1.53±0.67 |
| Triglyceride (TG), mM | 0.89±0.62 | 0.85±0.59 | 0.88±0.61 |
| N (%) | |||
| Farmer | 1706(77.5) | 774(76.5) | 2480(76.8) |
| <High school | 2103(94.2) | 926(92.4) | 3029(93.7) |
| Current Smoking | 31(1.4) | 10(1.0) | 41(1.3) |
| Current Alcohol Drinking | 57(2.6) | 22(2.2) | 79(2.4) |
| Larger Waist Circumference | 354(15.9) | 141(14.1) | 495(15.3) |
| Higher BP | 162(7.3) | 86(8.6) | 248(7.7) |
| Raised FPG | 119(5.3) | 49(4.9) | 168(5.2) |
| Raised TG | 179(8.0) | 65(6.5) | 244(7.5) |
| Lower HDL-C | 780(35.0) | 324(32.3) | 1104(34.1) |
| >=1 MS Components | 1117(50.0) | 483(48.2) | 1600(50.5) |
| Metabolic Syndrome (MS) | 101(4.5) | 42(4.2) | 143(4.4) |
Continuous variables are presented as mean ± standard deviation. Binary variables are summarized by N and percentage. Generalized estimating equations (GEE) were applied to compare the differences between MZ and DZ for all variables. TG and HDL-C were transformed by natural logarithm (i.e. lnTG and LnHDL) for all statistical analyses. Larger waist circumference denotes waist circumference≥80 cm; higher BP denotes SBP≥130 or DBP≥85 mmHg; raised FPG denotes FPG (6.1mM; raised TG denotes triglyceride (1.70mM/l; lower HDL-C denotes HDL<1.29mM/l. MS are defined as the subjects who meet the modified ATP-III Criteria. No significant difference was found for all variables between MZ and DZ subjects.