Table 2.

Results of preliminary exploratory factor analysis*

Variable	Source	Geometric factor	Substance factor
Depth	SCI-PUMT	0.82	NA
Tunneling	SCI-PUMT	0.77	NA
Edges	BWAT	0.55	NA
Undermining	SCI-PUMT	0.48	NA
Surface area	SCI-PUMT	0.35	0.51
Necrotic amount	BWAT	NA	0.52
Exudate type	SCI-PUMT	NA	0.40

*Factor loading <|0.30| have been replaced with “NA” for ease of reading.