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Table 2 Packed red blood cell unit storage age and deep vein thrombosis incidence: univariable analyses

From: Red blood cell transfusion and increased length of storage are not associated with deep vein thrombosis in medical and surgical critically ill patients: a prospective observational cohort study

 

Temporal relationship to DVT

Age of RBC units

Previous day

Previous 3 days

Previous week

Ever before

Any age

1.7 (0.6, 4.4)

1.0 (0.4, 2.4)

1.4 (0.6, 3.3)

1.4 (0.6, 3.3)

≤ 7 days

4.5 (0.6, 35.1)

2.0 (0.3, 15.5)

4.6 (1.3, 17.0)

3.6 (0.9, 14.3)

> 7 days

1.3 (0.4, 4.1)

0.8 (0.3, 2.2)

1.0 (0.4, 2.5)

1.2 (0.5,3.1)

≤ 14 days

1.9 (0.4, 8.4)

1.0 (0.2, 4.2)

1.4 (0.5, 4.3)

1.9 (0.7, 5.1)

> 14 days

1.4 (0.4, 5.0)

0.8 (0.3, 2.5)

1.2 (0.5, 3.0)

1.2 (0.5, 3.1)

≤ 21 days

1.8 (0.6, 5.7)

1.2 (0.4, 3.3)

1.7 (0.7, 4.3)

2.0 (0.8, 5.1)

> 21 days

1.0 (0.1, 7.6)

0.4 (0.1, 3.1)

1.4 (0.5, 4.3)

1.3 (0.4, 3.9)

  1. Data of the 241 patients analyzed and the temporal packed red blood cell (RBC) transfusion thresholds are shown. We present the hazard ratios (with 95% confidence intervals) for the association between risk of developing a deep vein thrombosis (DVT) in the intensive care unit (ICU) and RBC storage times. This association was determined by using four sets of data: (1) the data on the previous ICU day to predict DVT, (2) data from any time in the previous 3 days, (3) data from any time in the previous week in the ICU to predict DVT, and (4) data from any prior ICU day to predict DVT.