Table 4.

Patient distribution in 3 classes of standardized values around the mean value for all anticoagulant drugs (0) assessed at C-trough or at C-peak, with the number of patients and of bleeding complications recorded in each class. The equivalent DOAC plasma levels for each class are also reported

C-trough
Classes of standardized
C-trough values
Equivalent DOAC C-trough plasma levels (ng/mL)Patients, nFollow-up, yBleeding complication, nIncidence, % pt/yrs (95% CI)
ApixabanEdoxabanRivaroxabanDabigatran
2.5 mg/BID5 mg/BID30 mg60 mg20 mg110 mg/BID150 mg/BID
≤ −0.50 (low levels) ≤77 ≤94 ≤23 ≤24 ≤22 ≤78 ≤68 531 513 15 2.92 (1.7-4.8) 
−0.49 to 0.50 (intermediate levels) 78-146 95-160 24-54 25-58 23-52 81-138 69-128 804 790 20 2.53 (1.6-3.9) 
> 0.50 (high levels) >149 >163 >55 >60 >53 >143 >132 322 302 15 4.97 (2.8-8.2) 
 --- --- --- --- --- --- --- 1657 1605 50 3.11 (2.3-4.1) 
C-trough
Classes of standardized
C-trough values
Equivalent DOAC C-trough plasma levels (ng/mL)Patients, nFollow-up, yBleeding complication, nIncidence, % pt/yrs (95% CI)
ApixabanEdoxabanRivaroxabanDabigatran
2.5 mg/BID5 mg/BID30 mg60 mg20 mg110 mg/BID150 mg/BID
≤ −0.50 (low levels) ≤77 ≤94 ≤23 ≤24 ≤22 ≤78 ≤68 531 513 15 2.92 (1.7-4.8) 
−0.49 to 0.50 (intermediate levels) 78-146 95-160 24-54 25-58 23-52 81-138 69-128 804 790 20 2.53 (1.6-3.9) 
> 0.50 (high levels) >149 >163 >55 >60 >53 >143 >132 322 302 15 4.97 (2.8-8.2) 
 --- --- --- --- --- --- --- 1657 1605 50 3.11 (2.3-4.1) 
C-Peak
Classes of standardized
C-peak values
Equivalent DOAC C-peak plasma levels (ng/mL)Patients, nFollow-up, yBleeding complication, nIncidence, % pt/yrs (95% CI)
ApixabanEdoxabanRivaroxabanDabigatran
2.5 mg/BID5 mg/BID30 mg60 mg20 mg110 mg/BID150 mg/BID
≤ −0.50 (low levels) ≤189 ≤202 ≤149 ≤197 ≤165 ≤172 ≤159 454 443 14 3.16 (1.7-5.3) 
−0.49 to 0.50 (intermediate levels) 191-294 203-291 151-232 205-309 166-260 173-277 165-248 476 457 14 3.06 (1.7-5.1) 
> 0.50 (high levels) >304 >297 >233 >310 >268 >279 >267 368 360 11 3.06 (1.5-5.5) 
 --- --- --- --- --- --- --- 1298 1298 39 3.09 (2.2-4.2) 
C-Peak
Classes of standardized
C-peak values
Equivalent DOAC C-peak plasma levels (ng/mL)Patients, nFollow-up, yBleeding complication, nIncidence, % pt/yrs (95% CI)
ApixabanEdoxabanRivaroxabanDabigatran
2.5 mg/BID5 mg/BID30 mg60 mg20 mg110 mg/BID150 mg/BID
≤ −0.50 (low levels) ≤189 ≤202 ≤149 ≤197 ≤165 ≤172 ≤159 454 443 14 3.16 (1.7-5.3) 
−0.49 to 0.50 (intermediate levels) 191-294 203-291 151-232 205-309 166-260 173-277 165-248 476 457 14 3.06 (1.7-5.1) 
> 0.50 (high levels) >304 >297 >233 >310 >268 >279 >267 368 360 11 3.06 (1.5-5.5) 
 --- --- --- --- --- --- --- 1298 1298 39 3.09 (2.2-4.2) 

CI, confidence interval; pt/y, patient/years.

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