Figure 3. Kaplan-Meier survival curve of the time to revision for the most common etiologies of implant revision, infection and aseptic loosening.

Per definition, early infection cases occur within the first three months. Note the steeper curve of chronic infections where close to 80% of implants were revised during the first 36 months. In comparison, the probability of revising an implant due to aseptic loosening appears in linear correlation to the time after the primary implant. The logrank test shows Chi-square values of 235.38 and a p-value of <0.0001