Table 2. The stabilities of PT/INR, APTT, Fbg, TT, FVIII:C, and FIX:C.
| Mean percentage change (%) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 h | 4 h | 6 h | 8 h | 12 h | 24 h | Acceptable Time (h) | ||||||||
| 4°C | 25°C | 4°C | 25°C | 4°C | 25°C | 4°C | 25°C | 4°C | 25°C | 4°C | 25°C | 4°C | 25°C | |
| PT (s) | −2.66 | −3.29 | −2.69 | −4.20 | −2.08 | −4.62 | −2.06 | −4.90 | −0.37 | −3.80 | 6.58 | 5.97 | 24 | 24 |
| INR | −2.63 | −3.26 | −2.66 | −4.16 | −2.06 | −4.58 | −2.04 | −4.85 | −0.36 | −3.65 | 6.51 | 6.81 | 24 | 24 |
| APTT (s) | 0.13 | −0.43 | 2.71 | 1.48 | 4.59 | 3.98 | 4.82 | 6.56 | 8.01 | 12.92* | 17.46* | 20.4* | 12 | 8 |
| TT (s) | −0.51 | −0.26 | −1.23 | −0.85 | −1.11 | −0.93 | −1.84 | −0.79 | −1.29 | −1.25 | 0.31 | 2.09 | 24 | 24 |
| Fbg (g/L) | 1.43 | 0.67 | 2.56 | 1.24 | 1.85 | 0.86 | 2.56 | 1.71 | 1.68 | 1.25 | 2.34 | 0.86 | 24 | 24 |
| FVIII:C (%) | −6.98 | −6.09 | −14.72* | −14.63* | −20.82* | −23.71* | −23.05* | −30.72* | −29.13* | −41.62* | −44.30* | −49.13* | 2 | 2 |
| FIX:C (%) | −3.58 | −3.07 | −6.43 | −6.58 | −8.91* | −9.67* | −8.76* | −11.08* | −11.63* | −15.32* | −13.17* | −15.59* | 4 | 4 |
*indicates that changes >10% in individual samples occurred in >25% of samples.