Predictors of time to healing deep pressure ulcers.

Time to healing analysis methods (Kaplan-Meier time until healing curves) were used to compare time to healing deep pressure ulcers as a function of patient and wound characteristics at baseline and after two weeks of treatment. Time to healing was significantly reduced in patients who had a good nutritional status. Patients who were alert and coherent were also found to heal more expediently; however, mental status was not independently predictive of time to healing in the multivariable model. Larger wounds took longer to heal (median 20 days) than smaller wounds, but the difference was not statistically significant. After two weeks of treatment, ulcers in patients who were 60 to 70 years old, who had a good nutritional status at baseline and whose ulcers reduced at least 39 percent in size after two weeks, were found to heal much more expediently. Cox regression models showed that these factors were independently predictive of time until healing (Likelihood ratio statistic on 5 DF = 26.485, p < 0.001). Clinical assessments, both at baseline and regular intervals thereafter, may predict treatment outcome of full-thickness pressure ulcers.