Table 3.

Crude and adjusted marginal means or effects of studied factors on EEV and PEV Counts

VariableEEVs (n = 631)PEVs (n = 632)
CrudeAdjusted* †CrudeAdjusted
Mean/effect95% CIPMean/effect95% CIPMean/effect95% CIPMean/effect95% CIP
Processing factors             
 Filter   <.0001      <.0001    
  Fe-WBf 477.3 (324.5 to 630.0)     73.4 (–310.3 to 457.1)     
  M-WBf 1098.2 (861.4 to 1329.8)     16.0 (–767.5 to 799.4)     
  Fr-WBf 1095.6 (786.3 to 1410.0)     4555.3 (3967.0 to 5143.5)     
  M-RBCf 129.4 (–456.8 to 715.6)     33.5 (–1439.2 to 1506.2)     
  Fe-RBCf 438.9 (299.4 to 578.4)     25.1 (–325.3 to 375.5)     
 Preparation time, h 36.8 (18.2 to 55.5) <.001 25.4 (6.2 to 44.6) .01 119.2 (67.5 to 171.0) <.0001    
Product factors             
 Storage time, d 45.5 (35.8 to 55.3) <.0001 42.4 (27.9 to 56.9) <.0001 5.4 (–23.5 to 34.2) .7146    
 Erythrocyte count, ×1012/L 75.6 (–80.0 to 231.1) .34    −381.2 (–815.0 to 52.6) .0849    
 Platelet count, ×109/L 6.2 (3.0 to 9.5) <.001    67.1 (59.7 to 74.6) <.0001 67.1 (59.7 to 74.6) <.0001 
 Volume, mL 3.7 (–0.5 to 7.9) .08    16.1 (4.5 to 27.6) .0067    
Donor factors             
 Donor age, y −1.3 (–7.5 to 5.0) .69    6.9 (–10.5 to 24.3) .44    
 Donor sex   .20      .01    
  Female 671.5 (523.0 to 820.0)     1128.3 (716.0 to 1540.6)     
  Male 547.4 (431.7 to 663.1)     435.6 (114.6 to 756.7)     
 Blood group   <.0001      <.001    
  O 509.7 (378.0 to 641.4)     638.2 (270.0 to 1006.3)     
  A 558.3 (426.2 to 690.5)     439.1 (69.7 to 808.5)     
  B 1273.8 (911.9 to 1635.7)     2748.4 (1736.8 to 3760.0)     
  AB 1897.3 (1032.1 to 2762.5)     2574.4 (156.2 to 4992.6)     
  Rh(D)   .48      .68    
  Positive 607.2 (595.1 to 705.4)     444.8 (718.4 to 992.0)     
  Negative 510.4 (333.4 to 759.9)     −135.6 (559.8 to 1255.2)     
 Erythrocyte count, ×1012/L 224.8 (–16.1 to 465.6) .07 264.9 (40.4 to 489.4) .02 −712.8 (–1383.5 to −42.1) .04    
 White blood cell count, ×109/L 6.0 (–47.3 to 59.3) .83    97.0 (–51.4 to 245.3) .20    
VariableEEVs (n = 631)PEVs (n = 632)
CrudeAdjusted* †CrudeAdjusted
Mean/effect95% CIPMean/effect95% CIPMean/effect95% CIPMean/effect95% CIP
Processing factors             
 Filter   <.0001      <.0001    
  Fe-WBf 477.3 (324.5 to 630.0)     73.4 (–310.3 to 457.1)     
  M-WBf 1098.2 (861.4 to 1329.8)     16.0 (–767.5 to 799.4)     
  Fr-WBf 1095.6 (786.3 to 1410.0)     4555.3 (3967.0 to 5143.5)     
  M-RBCf 129.4 (–456.8 to 715.6)     33.5 (–1439.2 to 1506.2)     
  Fe-RBCf 438.9 (299.4 to 578.4)     25.1 (–325.3 to 375.5)     
 Preparation time, h 36.8 (18.2 to 55.5) <.001 25.4 (6.2 to 44.6) .01 119.2 (67.5 to 171.0) <.0001    
Product factors             
 Storage time, d 45.5 (35.8 to 55.3) <.0001 42.4 (27.9 to 56.9) <.0001 5.4 (–23.5 to 34.2) .7146    
 Erythrocyte count, ×1012/L 75.6 (–80.0 to 231.1) .34    −381.2 (–815.0 to 52.6) .0849    
 Platelet count, ×109/L 6.2 (3.0 to 9.5) <.001    67.1 (59.7 to 74.6) <.0001 67.1 (59.7 to 74.6) <.0001 
 Volume, mL 3.7 (–0.5 to 7.9) .08    16.1 (4.5 to 27.6) .0067    
Donor factors             
 Donor age, y −1.3 (–7.5 to 5.0) .69    6.9 (–10.5 to 24.3) .44    
 Donor sex   .20      .01    
  Female 671.5 (523.0 to 820.0)     1128.3 (716.0 to 1540.6)     
  Male 547.4 (431.7 to 663.1)     435.6 (114.6 to 756.7)     
 Blood group   <.0001      <.001    
  O 509.7 (378.0 to 641.4)     638.2 (270.0 to 1006.3)     
  A 558.3 (426.2 to 690.5)     439.1 (69.7 to 808.5)     
  B 1273.8 (911.9 to 1635.7)     2748.4 (1736.8 to 3760.0)     
  AB 1897.3 (1032.1 to 2762.5)     2574.4 (156.2 to 4992.6)     
  Rh(D)   .48      .68    
  Positive 607.2 (595.1 to 705.4)     444.8 (718.4 to 992.0)     
  Negative 510.4 (333.4 to 759.9)     −135.6 (559.8 to 1255.2)     
 Erythrocyte count, ×1012/L 224.8 (–16.1 to 465.6) .07 264.9 (40.4 to 489.4) .02 −712.8 (–1383.5 to −42.1) .04    
 White blood cell count, ×109/L 6.0 (–47.3 to 59.3) .83    97.0 (–51.4 to 245.3) .20    

Data are reported as mean (95% CI): marginal or predicted means for categorical variables and the predicted effect for a 1-unit change of the covariate for quantitative variables.

*

Interaction term between product platelet count and filter type was significant (P = .0003). Platelet count effect for filter type RZ2000, 126.6; LXT, 178.4; Fr, −104.8; NPT, 62.1; and OptiPure, 6.0.

Interaction term between donor blood group and storage time was significant (P = .0003). Storage time effect for blood group O, 0; A, −6.3; B, 27.3; and AB, 58.0.

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