Table 2.

Weighted means analysis of glomerular filtration rate (mL/min/kg) for published feline studies

	Number of studies	Number of mean GFR measurements	Weighted mean GFR	95% CI
Renal inulin clearance	5b	5	3.04	2.59–3.49
Plasma inulin clearance	4c	7	3.05	2.67–3.44
Renal exogenous creatinine clearance	5d	6	2.92	2.66–3.18
Plasma exogenous creatinine clearance	4e	7	2.86	2.28–3.45
Plasma iohexol clearancea	5f	8	2.52	2.19–2.86

GFR, glomerular filtration rate; CI, confidence intervals.

^aOnly assays which reported total serum iohexol (versus eno- or exo-iohexol) concentration were included in weighted means analysis

^bRoss and Finco, 1981; Uribe et al., 1992; Brown et al., 1996a; Brown et al., 1996b; McClellan et al., 2006

^cFettman et al., 1985; Rogers et al., 1991; Brown et al., 1996; Miyamoto, 2001a

^dRoss and Finco 1981; Rogers et al., 1991; Brown et al., 1996a; Miyamoto, 2001a; Miyamoto, 2001b

^eBrown et al., 1996b; van Hoek et al., 2007; Heine et al., 2009; van Hoek et al., 2009

^fBecker et al, 2000; Miyamoto, 2001b; Goy-Thollot et al., 2006b; Goodman et al., 2009; Heiene et al., 2009