Table 1

The univariate statistics for the PAS patterns

Variable	β	Wald	Significance	Exp(β)	95% Confidence interval for exp (β)
Normal	0.918	9.21	0.002	2.5	1.38–4.53
Silence	0.081	0.06	0.80	1.08	0.58−2.03
Straight vessels	–0.214	0.53	0.47	0.81	0.46−1.43
Parallel	−0.340	1.35	0.25	0.71	0.40−1.26
Parallel with cross links	−0.580	2.95	0.09	0.56	0.29−1.09
Arcs	−0.765	6.45	0.01	0.47	0.26−0.84
Arcs with branches	−1.039	10.8	0.001	0.35	0.32−0.66
Loops	−1.057	11.9	0.0006	0.35	0.19−0.63
Networks	−1.010	11.2	0.0008	0.36	0.20−0.66