Table 1. Predictor variables identified from the univariate analysis stage, and from other studies, only 8 of which were taken forward to the multivariate analysis stage (indicated with *).

Variables identified in univariate analysis
Hyperlipidaemia*
Number of medication ≥8*
Length of stay ≥12 days*
Use of anti-diabetic agents*
High white blood cell count on admission*
Diabetes
Arthritis/osteoarthritis
Antihypertensives
Opioid analgesics
Angiotensin converting enzymes inhibitors
β-blockers
Cardiac glycosides
Anti-infective medicines
Variables identified in other studies
History of previous ADR* [8], [28]
Number of co-morbidities ≥4* [29]
Drugs with a narrow therapeutic index* [27], [30]
Congestive cardiac failure [31]
Liver failure [32], [33]

All variables are binary, and not continuous.