The results of principal components analysis followed by varimax rotation for the nine PAS patterns. The factor coefficients have been sorted according to size
| Variable | Factor 1 | Factor 2 | Factor 3 |
|---|---|---|---|
| Arcs | 0.83 | 0.00 | 0.11 |
| Arcs with branches | 0.77 | 0.37 | −0.02 |
| Normal | −0.64 | −0.32 | −0.31 |
| Silence | −0.57 | 0.04 | −0.10 |
| Networks | 0.25 | 0.76 | 0.13 |
| Loops | 0.42 | 0.75 | 0.09 |
| Straight vessels | 0.40 | −0.69 | 0.16 |
| Parallel | 0.24 | −0.16 | 0.84 |
| Parallel with cross links | 0.01 | 0.50 | 0.70 |