Table 1.
Relationship Between FVIII Concentration and Parameters of APTT Waveform.
| Correlation Coefficient | P | Regression Equation | |
|---|---|---|---|
| Peak of acceleration | −0.587 | .0001 | Y = 27.9 − 0.308 X |
| Height of acceleration-1 | 0.760 | <.0001 | Y = −1.68 + 0.038 X |
| Height of acceleration-2 | 0.760 | <.0001 | Y = .0.314 + 0.069 X |
| Width of acceleration-1 | −0.407 | .0124 | Y = 14.8 − 0.219 X |
| Width of acceleration-2 | −0.353 | .0320 | Y = 13.6 − 0.039 X |
| Peak of velocity | −0.508 | .013 | Y = 20.2 − 0.136 X |
| Height of velocity | 0.547 | .0005 | Y = −1.19 + 0.058 X |
| Width of velocity | −0.372 | .0235 | Y = 14.0 − 0.048 X |
| Peak of ½ fibrin formation | −0.527 | .0008 | Y = 20.6 − 0.131 X |
| Height of ½ fibrin formation | −0.301 | .0699 | Y = 17.4 − 0.020 X |
| APTT | −0.541 | .0006 | Y = 23.9 − 0.227 X |
| Fibrinogen | 0.021 | .9027 | Y = 7.76 + 0.003 X |
Abbreviation: APTT, activated partial thromboplastin time.