| 48 hours | 4 weeks | |
Herculite XRV | Mean | 41.3 | 38.3 |
SD | 2.78 | 1.79 | |
Spectrum TPH | Mean | 38.6 | 36.9 |
SD | 0.40 | 1.25 | |
SDR | Mean | 40.6 | 38.5 |
SD | 3.98 | 1.02 |