Table 2.

Statistical values of measured parameters in reticular dermis

Parameter	Regression equation	R2	F	P	Constant	b1	b2	b3
Thickness of reticular dermis (μm)	Quadratic	0.193	5.018	0.011	1603.882	68.296	−0.713	–
Area fraction occupied by collagen bundles (%)	Cubic	0.392	8.803	< 0.0001	81.141	−0.723	0.014	−9.036 × 10−5
Thickness of collagen bundles (μm)	Quadratic	0.433	16.028	< 0.0001	5.039	0.199	−0.002	–
Collagen orientation	Quadratic	0.334	10.54	< 0.0001	0.757	0.004	−5.578 × 10−5	–