Figure 4. Graft survival (percentage of total wound area) for wounds implanted with porcine acellular dermal matrix (ADM) and split-thickness autografts (STSG; Xeno-ADM), rat ADM and STSG (Allo-ADM), thin STSG control (0.005 STSG), thick STSG control (0.017 STSG), untreated allograft (rejection control), and untreated xenograft (rejection control) groups. Graft survival of the xenogenic ADM was significantly less (P < .01, paired t test) than that of each of the other three groups on days 14 and 20. Shown are means ± standard error (n = 29).