Table 1

Subject characteristics for TLC patients: patients screened by Doppler echocardiography with a reported TRV versus patients screened without a reported TRV

Patients with TRV reported, n = 148Patients with no TRV reported, n = 177Total, n = 325P*
Age at enrollment, mean (SD) 25.9 (12.1) 22.6 (11.6) 24.1 (11.9) .01 
Sex, n (%)     
    Male 78 (52.7) 79 (44.6) 157 (48.3) .15 
    Female 70 (47.3) 98 (55.4) 168 (51.7)  
Race, n (%)     
    White 75 (51.4) 80 (45.7) 155 (48.3) .61 
    Black 2 (1.4) 4 (2.3) 6 (1.9)  
    Asian 64 (43.8) 87 (49.7) 151 (47.0)  
    Other 5 (3.4) 4 (2.3) 9 (2.8)  
Diagnosis, n (%)     
    β-thalassemia, transfused ≥ 8 times/previous 12 mo 108 (73.0) 140 (79.1) 248 (76.3) .07 
    β-thalassemia, with a history of transfusion but < 8 times/previous 12 mo 9 (6.1) 12 (6.8) 21 (6.5)  
    β-thalassemia, never transfused 1 (0.7) 4 (2.3) 5 (1.5)  
    HbH disease 1 (0.7) 0 (0.0) 1 (0.3)  
    HbH Constant Spring disease 3 (2.0) 3 (1.7) 6 (1.8)  
    E-β-thalassemia, transfused ≥ 8 times/previous 12 mo 18 (12.1) 10 (5.7) 28 (8.6)  
    E-β-thalassemia, with a history of transfusion but < 8 times/previous 12 mo 5 (3.4) 3 (1.7) 8 (2.5)  
    E-β-thalassemia, never transfused 1 (0.7) 0 (0.0) 1 (0.3)  
    Homozygous α-thalassemia 0 (0.0) 5 (2.8) 5 (1.5)  
    Other 2 (1.4) 0 (0.0) 2 (0.6)  
Patients with TRV reported, n = 148Patients with no TRV reported, n = 177Total, n = 325P*
Age at enrollment, mean (SD) 25.9 (12.1) 22.6 (11.6) 24.1 (11.9) .01 
Sex, n (%)     
    Male 78 (52.7) 79 (44.6) 157 (48.3) .15 
    Female 70 (47.3) 98 (55.4) 168 (51.7)  
Race, n (%)     
    White 75 (51.4) 80 (45.7) 155 (48.3) .61 
    Black 2 (1.4) 4 (2.3) 6 (1.9)  
    Asian 64 (43.8) 87 (49.7) 151 (47.0)  
    Other 5 (3.4) 4 (2.3) 9 (2.8)  
Diagnosis, n (%)     
    β-thalassemia, transfused ≥ 8 times/previous 12 mo 108 (73.0) 140 (79.1) 248 (76.3) .07 
    β-thalassemia, with a history of transfusion but < 8 times/previous 12 mo 9 (6.1) 12 (6.8) 21 (6.5)  
    β-thalassemia, never transfused 1 (0.7) 4 (2.3) 5 (1.5)  
    HbH disease 1 (0.7) 0 (0.0) 1 (0.3)  
    HbH Constant Spring disease 3 (2.0) 3 (1.7) 6 (1.8)  
    E-β-thalassemia, transfused ≥ 8 times/previous 12 mo 18 (12.1) 10 (5.7) 28 (8.6)  
    E-β-thalassemia, with a history of transfusion but < 8 times/previous 12 mo 5 (3.4) 3 (1.7) 8 (2.5)  
    E-β-thalassemia, never transfused 1 (0.7) 0 (0.0) 1 (0.3)  
    Homozygous α-thalassemia 0 (0.0) 5 (2.8) 5 (1.5)  
    Other 2 (1.4) 0 (0.0) 2 (0.6)  

HbH indicates hemoglobin H; TLC, Thalassemia Longitudinal Cohort; and TRV, tricuspid regurgitant jet velocity.

*

P value is to compare patients with TRV and without TRV.

Five patients missing data for race.

One patient missing data for diagnosis.

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