Table 5.
Validation statistics for models of whole course of care and first encounter healing likelihood
| Number of VLUs = 1,044;aNumber Healed (%) = 809 (77.5%) |
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|---|---|---|---|---|---|---|
| 90% Whole-course model |
90% First Encounter Model |
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| p-value | Hosmer–Lemeshow p-value | C-statisticb | p-value | Hosmer–Lemeshow p-value | C-statisticb | |
| Wound Healing Index | <0.0001 | 0.3319 | 0.619 | <0.0001 | 0.4741 | 0.594 |
a
A 10% validation sample (n = 1,177) was randomly selected from the study sample. However, 133 of these VLUs did not have a wound area recorded at first visit before debridement and were therefore excluded from the model validation analysis. Thus, the final sample used to validate the regression analysis was 1,044.
b
c-statistic = performance metric of model discrimination equivalent to the area under the receiver operating characteristic curve.