Table 1.
Baseline characteristics of African American participants by sickle cell trait status, 1985-1986
| Variable | Total | No SCT | SCT | P value* |
|---|---|---|---|---|
| No., %† | 1995 | 1859 (93.2) | 136 (6.8) | |
| Age, years | 24.3 (3.8) | 24.3 (3.8) | 24.8 (3.9) | .17 |
| Male, % | 44.0 | 44.1 | 42.7 | .75 |
| BMI, kg/m2 | 25.2 (5.4) | 25.2 (5.5) | 24.7 (4.8) | .27 |
| Waist circumference, cm | 78.2 (11.7) | 78.3 (11.8) | 77.1 (10.7) | .23 |
| Hypertension, % | 3.1 | 3.1 | 2.9 | .93 |
| Systolic BP, mm Hg | 111.4 (10.8) | 111.3 (10.9) | 111.7 (10.3) | .70 |
| Diastolic BP, mm Hg | 68.8 (9.9) | 68.7 (9.9) | 70.7 (10.1) | .02 |
| Triglyceride, mg/dL (median [IQR]) | 58.0 (43.0-78.0) | 58.0 (43.0-78.0) | 57.0 (43.0-79.0) | .80 |
| LDL cholesterol, mg/dL | 110.3 (32.1) | 110.5 (32.1) | 108.2 (31.9) | .44 |
| HDL cholesterol, mg/dL | 54.4 (13.1) | 54.3 (13.1) | 55.2 (13.6) | .46 |
| Diabetes, % | 0.8 | 0.8 | 0.0 | .29 |
| Fasting glucose, mg/dL | 81.8 (15.6) | 81.9 (16.0) | 79.9 (8.1) | .14 |
| Metabolic syndrome, % | 2.0 | 2.0 | 2.2 | .93 |
| Total physical activity, EU (median [IQR]) | 316.0 (159.0-537.0) | 317.0 (162.0-537.0) | 294.0 (130.0-525.0) | .55 |
Values are presented as means (SD) unless otherwise indicated.
EU, exercise units; IQR, interquartile range (Q1-Q3); LDL, low-density lipoprotein.
*
P values for comparisons between SCT and No SCT (reference).
†
May vary for some variables.