AUC	under the curve area
ADL	activity of daily living
AMTS	Abbreviated Mental Test Score
CFS	Clinical Frailty Scale
CI	confidence interval
ESPEN	European Society for Clinical Nutrition and Metabolism
GDS	Geriatric Depression Scale
GFR	glomerular filtration rate
HOOP	Hydration and outcome in older patients admitted to hospital
IADL	instrumental activities of daily living
IQR	interquartile range
M	mean
Me	median
MNA-SF	Mini Nutritional Assessment- Short Form
n	number of cases
OARS	Older Americans Resources and Services
ROC	receiver-operating characteristic
SD	standard deviation