Table 1.

Characteristics of the study population

	Total population, n=719
Age, mean (SD), years	81 (10)
Sex, n (%) male	345 (48)
Housing before admission (%)
Home without homecare	403 (56)
Home with homecare	169 (24)
Nursing home	146 (20)
Length of stay, median days (IQR)
In the hospital	10 (6–16)
In the ward	8 (5–14)
No of drugs, median (IQR)
At admission
Continuous use	7 (5–11)
As needed	1 (0–2)
At discharge
Continuous use	8 (5–11)
As needed	2 (1–3)
During the hospital stay
Initiated	2 (1–4)
Stopped	1 (0–3)
Renal function reduction, n (%)*
No reduction	84 (11.7)
Mild, GFR 60–89 mL/min	157 (21.8)
Moderate, GFR 30–59 mL/min	313 (43.5)
Severe, GFR 15–29 mL/min	115 (16.0)
Kidney failure, GFR <15 mL/min	14 (1.9)
No information	36 (5.0)
Drug allergy or hypersensitivity documented in the EHR, n (%)	133 (18.5)

*Renal function was calculated using the Cockroft-Gault equation.

EHR, electronic health record; GFR, glomerular filtration rate.