Table 1.

Patient demographics.

Characteristic	Cases	Controls	p Value
Number	86	258
Age (y), mean ± SD	65.81 ± 19.6	63.73 ± 19.7	0.16*
Median (range)	68.0 (18–98)	66.0 (19–102)
Female, n (%)	49 (57)	147 (57)	1.00**
Length of hospital stay (days), median (IQR)	8 (9)	3 (7)	<0.0001*
Median time between hospital admission and diagnosis of ADR (days; range)	2 (−6 to 34)	Not applicable
Number of patients diagnosed with ADR on day of admission or before admission (%)	22 (26)	Not applicable

^*Mann–Whitney U test.

^**Chi-square test.

ADR, adverse drug reaction; IQR, interquartile range.