Fig. 3From: Impact of quality certification of multidisciplinary head and neck tumor centersComparison of patient complexity and financial records from 2008–2012 to 2013–2017. a, b, d: Average case mix index, average patient clinical competency level (PCCL) and the difference between DRG reimbursement and actual costs were tested nonparametric with Mann-Whitney U test. c Comparison of DRG reimbursement and average cost were assessed parametric with one-way ANOVA and post-hoc Tukey for multiple comparisons. Data are shown as mean ± SEMBack to article page