Table 1. Number of participants excluded from the final sample due to exclusion criteria.

Total cohort	875
Readmission	8
Incomplete data sets	4
Deceased within 6 hours of admission	15
Certified brain dead (admission for organ donation)	3
Admission for chemotherapy	3
End stage kidney failure, not for dialysis	1
Hospital outcome unknown	12
Total exclusions	46
Final number of participants analysed	829