Table 1
Variance components for normalised diameters of retinal arterioles and venoles during hyperbaric oxygen treatment (HO)
| Variance source | Degrees of freedom | Mean squares |
|---|---|---|
| The mean control diameter of each vessel before HO was used for normalisation. Main effects and first order interactions are shown in the upper and middle part of the table, respectively. All components of variance and interactions were significantly larger than the residual variance (p<0.001) shown in the lower part of the table. | ||
| *Statistical interaction between factors. | ||
| Vessel | 1 | 1.304 |
| Patient | 2 | 0.010 |
| Time during HO | 5 | 0.400 |
| Day of examination | 6 | 0.082 |
| Vessel* patient | 2 | 0.217 |
| Vessel* day | 6 | 0.052 |
| Patient* day | 12 | 0.062 |
| Patient* time | 10 | 0.029 |
| Vessel* time | 5 | 0.069 |
| Day* time | 30 | 0.013 |
| Residual error | 504 | 0.0006 |
