Demographic and clinical characteristics of US-White men in Allegheny County, USA, and Japanese men in Kusatsu, Japan
| Variables | US-White men (n=270) | Japanese men (n=300) | P value | ||
| Mean | SD | Mean | SD | ||
| Age*, years | 44.9 | 2.8 | 45.1 | 2.8 | 0.442 |
| Waist circumference*, cm | 98.0 | 11.3 | 85.1 | 8.2 | <0.001 |
| Body mass index*, kg/m2 | 27.7 | 4.0 | 23.7 | 3.1 | <0.001 |
| Pack-years of smoking† | 0.0 | (0.0–2.0) | 18.75 | (3.0–29.0) | <0.001 |
| Systolic blood pressure*, mm Hg | 122.8 | 11.4 | 124.8 | 15.7 | 0.092 |
| Hypertension‡ | 13.3 | – | 25.7 | – | <0.001 |
| Current smoker‡ | 7.8 | – | 49.3 | – | <0.001 |
| Current drinker‡ | 45.6 | – | 67.2 | – | <0.001 |
| Alcohol consumption†, g/day | 4.9 | (1.0–16.5) | 14.3 | (2.4–42.0) | <0.001 |
| Fasting glucose*, mg/dL | 101.2 | 15.4 | 106.7 | 18.6 | <0.001 |
| Diabetes mellitus‡ | 3.3 | – | 5.7 | – | 0.182 |
| Fibrinogen*, µmol/L | 8.5 | 2.1 | 7.5 | 1.9 | <0.001 |
| Fasting insulin*, µIU/mL | 14.7 | 7.6 | 10.2 | 4.4 | <0.001 |
| C-reactive protein†, nmol/L | 8.6 | (4.8–17.1) | 2.9 | (1.9–6.7) | <0.001 |
| Agatston Coronary Calcium Score >10‡ | 23.0 | – | 11.0 | – | <0.001 |
| Calcium score percentiles (50th, 75th, 90th, 95th) | (0, 8.9, 45.6, 119.8) | (0, 1.5, 13, 37.2) | – | ||
SI conversion factors: to convert glucose to mmol/L, multiply values by 0.0555.
*Continuous normally distributed variables expressed in mean (SD) and compared using a two-sample t-test.
†Continuous non-normally distributed variables expressed in median (IQR) and compared using the Mann-Whitney U test.
‡Categorical variable expressed as percentages and compared using Pearson’s χ2 test.