Table 1.

Preoperative characteristics of patients undergoing primary arthroplasty (n=413)

Characteristics		n
Mean age in years: 66.5 (SD: 10.8, range: 21–89)
Sex	Male	166 (40.7%)
	Female	245 (59.3%)
Procedure	Hip replacement	187 (45.3%)
	Knee replacement	226 (54.7%)
Preoperative renal impairment	Total	52 (12.6%)
	eGFR <60ml/min/1.73m2	39 (9.4%)
	Creatinine >120μmol/l	13 (3.1%)
Diabetes mellitus		58 (14.0%)
ACEis/ARBs		150 (36.3%)
NSAIDs		136 (32.9%)
Diuretics	Total	95 (23.0%)
	Loop	35 (8.5%)
	Thiazide	56 (13.6%)
	Potassium sparing	4 (1.0%)

ACEis = angiotensin converting enzyme inhibitors; ARBs = angiotensin receptor blockers; eGFR = estimated glomerular filtration rate; NSAIDs = non-steroidal anti-inflammatory drugs; SD = standard deviation