Table 1.
Characteristics of monozygotic twin pairs (N = 69 pairs).
| Characteristics | Mean ± SD |
|---|---|
| No. of twins | 138 |
| Age (years) | 54.8 ± 2.9 |
| Cigarette smoking (pack-year) | 22.3 ± 23.8 |
| Alcohol consumption (g/week) | 12.5 ± 38.0 |
| Physical activity level | 7.5 ± 1.7 |
| BDI-II score | 6.0 ± 6.6 |
| Body mass index (kg/m2) | 28.9 ± 4.9 |
| HOMA-IR | 1.87 ± 1.34 |
| Fasting plasma glucose (mg/dL) | 97.2 ± 11.2 |
| HbA1c (%) | 5.5 ± 0.5 |
| Systolic blood pressure (mmHg) | 129.5 ± 15.4 |
| Diastolic blood pressure (mmHg) | 81.6 ± 10.9 |
| High-density lipoprotein cholesterol (mg/dL) | 38.5 ± 10.9 |
| Low-density lipoprotein cholesterol (mg/dL) | 123.7 ± 35.0 |
| Total cholesterol (mg/dL) | 186.9 ± 35.9 |
| Triglycerides (mg/dL) | 169.3 ± 96.5 |
BDI-II, the Beck Depression Inventory-II; HOMA-IR, the homeostasis model assessment of insulin resistance; HbA1c, hemoglobin A1c.