Table 2.

Summary of parameter definitions and notations in the in vivo analysis of dermal papillae within the dermal papilla zone

Parameter	Definition	Notation
Depth of DPZ 14	Depth of DPZ	TDPZ
DP volume per unit area 14	$\frac{\text{Total}\mathrm{DP}\text{volume}}{{\mathrm{OA}}_{\max }}$	V
DP volume ratio within DPZ 14	$\frac{\text{Total}\mathrm{DP}\text{volume}}{{\mathrm{OA}}_{\max }\times T_{\mathrm{DPZ}}}$	R
3D inter‐digitation index 14	$\frac{\text{Total}\mathrm{DP}\text{interface area}}{{\mathrm{OA}}_{\max }}$	I
2D collagen density in DP 14	$\frac{\text{Total collagen area in}\mathrm{DP}}{\text{Total}\mathrm{DP}\text{area}}$	D
Collagen volume in DP per unit area	DP volume per unit area × 2D collagen density in DP	CV