Figure 5From: Acute and long-term survival in chronically critically ill surgical patients: a retrospective observational studyUnivariate analysis of surgical efficacy versus cumulative hazard rate: first two years after inclusion. Univariate association between the number of surgical revisions (mean value per quartile) and the corresponding cumulative hazard rate for the first two years after inclusion in patients surviving more than 150 days. P = 0.033 after quadratic transformation of continuous data.Back to article page