Table 5.

DCEC scoring rules DCEC scoring rules.

Clarity	Normal	0
	Under clear/slightly fuzzy	1
	vague	2
	Unclear	3
Cross-sectional area	Normal	0
	≤ 1.5 normal value range	1
	≥ 1.5 normal value range	2
Echoes	Normal	0
	Increase/decrease	1
Compression	N	0
	Y	1

DCEC scoring rules included clarity, cross-sectional area, echoes and compression. Clarity: ”normal” marked “0”; ”Under clear/slightly fuzzy” marked “1”; ”vague” marked “2”; ”unclear” marked “3”; Cross-sectional area: ”normal” marked “0”; ”≤ 1.5 times” marked “1”; ”≥ 1.5 times” marked “2”; Echoes: ”normal” marked “0”;”increase/decrease” marked “1”; Compression: ”N” means not compression, marked “0”; ”Y” means compression, marked “1”.