Table 3.

Characteristics of patients with and without adverse drug reactions (ADRs)

	ADR group	Non-ADR group	Total
Number of admissions	218	969	1187
Age, mean (SD)	73.2 (14.5)	66.7 (19.2)	67.9 (18.6)
Male (%)	106 (48.6)	455 (47.0)	561 (47.3)
Number of medicines, mean (SD)	10.5 (4.6)	7.8 (5.1)	8.3 (5.1)
Polypharmacy (%)	199 (91.3)	706 (72.9)	905 (76.2)
Number of comorbidities, mean (SD)	6.1 (3.0)	5.2 (3.3)	5.4 (3.2)
Multimorbid (%)	99.1	90.3	91.9
Liver impairment* (%)	6.9	2.8	3.5
Renal impairment† (%)	11.0	6.8	7.6

*Liver impairment defined as chronic liver disease.

†Renal impairment defined as chronic kidney disease stage IV or V.