Table 1.

Participant characteristics

n (%)
Total participants 481 
Sex  
Male 108 (22.5) 
Female 371 (77.1) 
Participants with VWF:Ag 478 (99.4) 
Participants with VWF:RCo 401(83.4) 
Participants with VWF:GpIbM 38 (7.9) 
Participants with information on estrogen use 459 
No use at either time point 343 (74.7) 
Use at both time points 32 (7.0) 
Use at first time point only 23 (5.0) 
Use at second time point only 61 (13.3) 
Initial VWF:Ag >100% 182/478 (38) 
Initial VWF:RCo >100% 101/401 (25) 
Initial VWF:GpIbM >100% 13/38 (34) 
n (%)
Total participants 481 
Sex  
Male 108 (22.5) 
Female 371 (77.1) 
Participants with VWF:Ag 478 (99.4) 
Participants with VWF:RCo 401(83.4) 
Participants with VWF:GpIbM 38 (7.9) 
Participants with information on estrogen use 459 
No use at either time point 343 (74.7) 
Use at both time points 32 (7.0) 
Use at first time point only 23 (5.0) 
Use at second time point only 61 (13.3) 
Initial VWF:Ag >100% 182/478 (38) 
Initial VWF:RCo >100% 101/401 (25) 
Initial VWF:GpIbM >100% 13/38 (34) 
n (SD)
Mean age, y  
First laboratory time point 11 (5.5) 
Second laboratory time point 12.3 (5.5) 
Average time between laboratory draws, d 467 (794) 
Median hemoglobin first time point, g/dL 11.6 (2.7) 
Median hemoglobin second time point, g/dL 12.6 (2.3) 
Median change in hemoglobin between draws, g/dL 0.9 (2.6) (range, −6.5 to 11.0) 
n (SD)
Mean age, y  
First laboratory time point 11 (5.5) 
Second laboratory time point 12.3 (5.5) 
Average time between laboratory draws, d 467 (794) 
Median hemoglobin first time point, g/dL 11.6 (2.7) 
Median hemoglobin second time point, g/dL 12.6 (2.3) 
Median change in hemoglobin between draws, g/dL 0.9 (2.6) (range, −6.5 to 11.0) 

SD, standard deviation.

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