Table 5 Univariate analysis of all the analysed morphometric parameters

r₀, mm

2.74 (1.24-6.08)

< 0.05

r₁, mm

4.96 (1.80-13.62)

< 0.01

r₂, mm

1.69 (0.67-4.28)

NS

Area ratio, (r₁²+r₂²)r₀⁻²

0.89 (0.38-2.06)

NS

Asymmetry ratio, r₂² r₁⁻²

0.57 (0.24-1.37)

NS

n, junction exponent

0.89 (0.73-1.09)

NS

α (°)

1.06 (1.04-1.07)

< 0.001

 1st tertile (58.3-94.2)

1 (reference)

 2nd tertile (94.2-120.0)

4.57 (2.29-9.15)

< 0.001

 3rd tertile (120.1-175.9)

22.01 (11.08-43.74)

< 0.001

Φ₁ (°)

1.03 (1.02-1.04)

< 0.001

Φ₂ (°)

1.05 (1.04-1.06)

< 0.001

 1st tertile (1.3-41.3)

1 (reference)

 2nd tertile (41.3-63.8)

1.77 (1.05-3.02)

< 0.05

 3rd tertile (63.8-165.9)

3.62 (2.16-6.05)

< 0.001

 1st tertile (6.0–59.5)

1(reference)

 2nd tertile (59.5–77.6)

1.83 (1.02-3.28)

< 0.05

 3rd tertile (77.6-117.3)

8.73 (4.99-15.30)

< 0.001