Table 3 Area under the curve (AUC) values for Elixhauser Comorbidity Index (ECI) and Charlson Comorbidity Index (CCI) for studies reporting

Bulow et al. 2019 [16]

0.69 [0.68; 0.69]

0.67 [0.67; 0.68]

0.69 [0.68; 0.69]

0.67 [0.66; 0.67]

Inacio et al. 2016 [17]

0.77

0.77

Kim et al. 2018 [24]

0.807 [0.753; 0.862]

0.854 [0.806; 0.903]

Kurichi et al. 2007 [18]

0.68 [0.608; 0.715]

0.70 [0.657; 0.793]

Lopez-de-Andres et al. 2016 [25]

0.89 [0.88; 0.90]

0.92 [0.90; 0.93]

Menendez et al. 2014 [26]

0.794 [0.792; 0.796]

0.845 [0.844; 0.847]

Menendez et al. 2015a [27]

0.83 [0.83; 0.84]

0.86 [0.86; 0.86]

Menendez et al. 2015b [28]

0.786 [0.771; 0.801]

0.840 [0.828; 0.853]

Menendez et al. 2015c [29]

0.823 [0.819; 0.828]

0.852 [0.848; 0.856]

Neuhaus et al. 2013 [30]

0.77

Ondeck et al. 2018 [31]

0.682 [0.665; 0.698]

0.697 [0.680; 0.713]

Radley et al. 2008 [32]

0.68

Toson et al. 2015 [33

0.779 [0.767; 0.791]

0.777 [0.766; 0.789]

0.767 [0.757; 0.779]

0.731 [0.719; 0.743]

0.734 [0.727; 0.742]

0.705 [0.697; 0.712]

Toson et al. 2016 [33]

0.759 [0.751; 0.767]

0.753 [0.745; 0.761]

0.734 [0.729; 0.739]