Table 1.

Characteristics of cohort, by survival status

CharacteristicsSurvivors (n = 184)Died during follow-up (n = 29)Died during first iTTP episode (n = 9)Total cohort (N = 222)P*
Female sex 72.8% 55.2% 66.7% 70.3% .053 
Race     .070 
 White 44.6% 65.5% 33.3% 46.8%  
 African American 53.8% 31.0% 44.4% 50.5%  
 Other/unknown 1.6% 3.4% 22.2% 2.7%  
Age (y), median (IQR) 41 (28, 55) 42 (31,50) 44 (35, 77) 42 (29, 55) .451 
Total no. of iTTP episodes, median (IQR) 1 (1,3) 3 (1,5) 1 (1,1) 1 (1,3) <.001 
Comorbidities      
 Hypertension 48.9% 62.1% 66.7% 51.4% .188 
 Diabetes 23.4% 31.0% 33.3.% 24.8% .372 
 Obesity (BMI > 30) 37.5% 27.6% 33.3% 35.0% .302 
 Hyperlipidemia 23.9% 24.1% 11.1% 23.4% .979 
 Atrial fibrillation 7.1% 6.9% 11.1% 7.2% .974 
 Systemic lupus erythematosus 9.8% 6.9% 0.0% 9.0% .620 
 CKD 19.0% 48.3% 11.1% 22.5% .001 
Average remission ADAMT13 activity, median (IQR) 63.2 (42.9, 82.1) 39.0 (23.9, 64.0) n/a 61.2 (37.9, 78.6) .010 
Follow-up time (y), median (IQR) 4.8 (0.7, 11.8) 5.3 (0.8,8.0) n/a 4.5 (0.4, 11.5) .975 
CharacteristicsSurvivors (n = 184)Died during follow-up (n = 29)Died during first iTTP episode (n = 9)Total cohort (N = 222)P*
Female sex 72.8% 55.2% 66.7% 70.3% .053 
Race     .070 
 White 44.6% 65.5% 33.3% 46.8%  
 African American 53.8% 31.0% 44.4% 50.5%  
 Other/unknown 1.6% 3.4% 22.2% 2.7%  
Age (y), median (IQR) 41 (28, 55) 42 (31,50) 44 (35, 77) 42 (29, 55) .451 
Total no. of iTTP episodes, median (IQR) 1 (1,3) 3 (1,5) 1 (1,1) 1 (1,3) <.001 
Comorbidities      
 Hypertension 48.9% 62.1% 66.7% 51.4% .188 
 Diabetes 23.4% 31.0% 33.3.% 24.8% .372 
 Obesity (BMI > 30) 37.5% 27.6% 33.3% 35.0% .302 
 Hyperlipidemia 23.9% 24.1% 11.1% 23.4% .979 
 Atrial fibrillation 7.1% 6.9% 11.1% 7.2% .974 
 Systemic lupus erythematosus 9.8% 6.9% 0.0% 9.0% .620 
 CKD 19.0% 48.3% 11.1% 22.5% .001 
Average remission ADAMT13 activity, median (IQR) 63.2 (42.9, 82.1) 39.0 (23.9, 64.0) n/a 61.2 (37.9, 78.6) .010 
Follow-up time (y), median (IQR) 4.8 (0.7, 11.8) 5.3 (0.8,8.0) n/a 4.5 (0.4, 11.5) .975 

BMI, body mass index.

*

P values are for differences between patients who died after surviving their first iTTP episode (n = 29) and those who were alive at the end of follow-up (n = 184).

Median (IQR) follow-up time for patients who died during the first iTTP episode was 0.013 (0.002, 0.021) years.

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