Table 1.

Baseline characteristics of African American participants by sickle cell trait status, 1985-1986

VariableTotalNo SCTSCTP 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 
VariableTotalNo SCTSCTP 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.

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