Table 1.

Demographic characteristics of the enrolled studies.

First author	Publication year	No. enrolled	Age	Male, %	Hypertension, %	Diabetes, %	Chronic renal dysfunction, %	Contrast volume (F/C), ml	Furosemide administration	CIN definition	Jadad score
Gu GQ, et al.	2013	859	59	72	72	21	25.2	100/100	IV, 20 mg before procedure	SCr >25% of baseline, or >0.5 mg/dl, at 48 h post-procedure	3
Majumdar SR, et al.	2009	92	65	77	77	37	100	152/126	IV drip, 100 mg before procedure	SCr >25% of baseline, or >0.5 mg/dl, at 48 h post-procedure	5
Marenzi G, et al.	2012	170	74	78	83	40	100	181/158	IV, 0.5 mg/kg before procedure	SCr >25% of baseline, or >0.5 mg/dl, at 72 h post-procedure	4
Shemirani H, et al.	2012	120	65	51	–	–	–	119/133	Oral	SCr >0.5 mg/dl, at 48 h post-procedure	3
Solomon R, et al.	1994	53	65	66	–	53	100	132/125	IV, 80 mg before procedure	SCr >0.5 mg/dl, at 48 h post-procedure	3

CIN – contrast-induced nephropathy; F/C – furosemide/control; IV – intravenous injection; SCr – serum creatinine.