Fig. 3

Cumulative incidence plots of mortality for in-hospital mortality for patients without cancer diagnoses stratified by quartiles (Q1-Q4) of a: FI-OutRef, b: Age, c: No. of chronic diag., d: New chronic diag and e: New acute admissions. For proportion of cumulative mortality including 95% confidence interval (see Additional file 2: Appendix 2). Abbreviations: FI-OutRef: Frailty index by the number of admission laboratory test results outside the reference interval. No. of chronic diag: the number of unique chronic diagnoses within the 10-year period prior to the index admission. New chronic diag: The number of chronic diagnoses given in the 2-year period preceding the index admission. New acute admissions: the number of new acute admissions within the 2-year period preceding the index admission. 1) Note: FI-OutRef includes 2,607 of the 3,172 included patients who had 10 or more standard laboratory tests at admission