Table 1 Baseline demographics by sex and age groups for healthy participants (n = 3206)
Baseline variables | Age < 55 years | 55 <  = Age < 65 years | Age ≥ 65 years | Overall | p-value | ||||
|---|---|---|---|---|---|---|---|---|---|
Female | Male | Female | Male | Female | Male | Female | Male | ||
n = 972 | n = 549 | n = 795 | n = 383 | n = 313 | n = 194 | n = 2080 | n = 1126 | ||
Age, years | 47.9 (4.7) | 47.6 (4.8) | 59.1 (2.8) | 59.1 (2.9) | 68.2 (2.5) | 68.2 (2.6) | 55.2 (8.4) | 55.1 (8.8) | 0.57 |
Body weight (kg) | 64.0 (9.2) | 79.5 (9.8) | 62.9 (9.2) | 77.7 (10.0) | 62.3 (9.8) | 75.3 (10.0) | 63.3 (9.3) | 78.2 (10.0) |  < 0.001 |
Height (cm) | 164.3 (6.2) | 177.8 (7.0) | 162.6 (6.5) | 175.7 (7.0) | 161.5 (6.9) | 174.9 (6.2) | 163.2 (6.5) | 176.6 (7.0) |  < 0.001 |
BMI | 23.7 (2.9) | 25.1 (2.5) | 23.7 (2.9) | 25.1 (2.4) | 23.8 (3.0) | 24.6 (2.7) | 23.7 (2.9) | 25.0 (2.5) |  < 0.001 |
 BMI > 30 | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) |  |
Percent body fat | 30.9 (6.5) | 20.7 (5.3) | 31.9 (6.6) | 21.5 (5.3) | 32.7 (7.2) | 22.0 (5.7) | 31.5 (6.7) | 21.2 (5.4) |  < 0.001 |
Waist circumference (cm) | 77.0 (8.7) | 87.0 (8.4) | 78.1 (9.0) | 88.8 (8.4) | 78.5 (9.3) | 89.1 (9.0) | 77.6 (8.9) | 87.9 (8.5) |  < 0.001 |
hip circumference (cm) | 96.3 (8.5) | 98.2 (6.9) | 96.0 (8.2) | 97.8 (5.9) | 96.5 (8.2) | 98.0 (6.3) | 96.2 (8.4) | 98.0 (6.5) |  < 0.001 |
Systolic blood pressure | 114.2 (10.9) | 122.2 (9.6) | 117.9 (11.4) | 124.4 (9.6) | 121.1 (11.0) | 125.5 (9.6) | 116.6 (11.4) | 123.5 (9.7) |  < 0.001 |
Diastolic blood pressure | 73.9 (7.6) | 77.1 (7.1) | 74.2 (7.8) | 76.6 (7.4) | 73.0 (8.0) | 76.3 (7.3) | 73.9 (7.8) | 76.8 (7.2) |  < 0.001 |
Heart rate | 69.7 (9.7) | 67.0 (10.2) | 69.7 (9.6) | 65.6 (10.1) | 70.8 (10.0) | 67.8 (11.0) | 69.9 (9.7) | 66.7 (10.3) |  < 0.001 |
Family history of cardiac disease | 184 (18.9%) | 73 (13.3%) | 195 (24.5%) | 83 (21.7%) | 79 (25.2%) | 40 (20.6%) | 458 (22.0%) | 196 (17.4%) | 0.00 |
Ethnic background | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 White Caucasian | 733 (75.4%) | 403 (73.4%) | 610 (76.7%) | 296 (77.3%) | 261 (83.4%) | 162 (83.5%) | 1604 (77.1%) | 861 (76.5%) | 0.15 |
 South Asian | 43 (4.4%) | 31 (5.6%) | 23 (2.9%) | 18 (4.7%) | 4 (1.3%) | 4 (2.1%) | 70 (3.4%) | 53 (4.7%) |  |
 Chinese | 171 (17.6%) | 103 (18.8%) | 142 (17.9%) | 64 (16.7%) | 43 (13.7%) | 26 (13.4%) | 356 (17.1%) | 193 (17.1%) |  |
 Other | 25 (2.6%) | 12 (2.2%) | 20 (2.5%) | 5 (1.3%) | 5 (1.6%) | 2 (1.0%) | 50 (2.4%) | 19 (1.7%) |  |
Medications | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Aspirin | 15 (1.5%) | 15 (2.7%) | 29 (3.6%) | 30 (7.8%) | 19 (6.1%) | 18 (9.3%) | 63 (3.0%) | 63 (5.6%) |  < 0.001 |
 Statin | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) |  |