Table 2.

Reasons and number of venous leg ulcers excluded from venous leg ulcer wound healing index model development

Reason for Exclusion	No. of VLUs
Starting number of ulcers/wounds	26,713
Wound location not specified adequately for analysis	−8,640
No data available at the first encounter	−858
Delete when encounter date is after resolved date	−1,496
Require more than one wound encounter	−6
Require that first encounter date is not resolved date	−1,725
Keep wounds where longest gap between encounters is <90 days	−256
Require days between first and last encounter> = 5	−201
Wound outcome group “Throw out” (lost to follow up)	−212
Require wound age	−607
No areas, no evidence of outcome	−939
EvidenceStatus = None and MeasureStat2 = Depth or No	−0
Max wound area <0.25 cm2	−0
Encounter date duplicates with nonidentical data—keep worst	−0
Encounters after resolved date	−0
End number of VLUs	11,773

VLU, venous leg ulcer.