Table 2.

Glomerular filtration rate in ml min⁻¹ 1.73 m⁻² and in ml min⁻¹ (n = 36) estimated by creatinine clearance (CL_CR), and the Cockcroft & Gault, Robert, Kirpatrick and sMDRD formulae

	CLCR	Cockcroft formula	Robert formula	Kirkpatrick formula	sMDRD formula
Mean ± SD (ml min−1 1.73 m−2)	118.8 ± 53	101.6.0 ± 52.4	71.3 ± 22.8	91.9 ± 33.9	97.8 ± 37.5
Range	33.4–224.4	37.8–306.1	32.7–111.2	35.9–164.4	47.4–185.6
Coefficient of variation (%)	44.4	51.6	32	36.9	38.4
Mean ± SD (ml min−1)	123.4 ± 57.2	106.9 ± 60.9	74.3 ± 25.2	97.3 ± 43.2	101.6 ± 40.6
Range	33.2–275	33.5–353.8	30.2–124.7	33.5–230	46.4–219
Bias (%)	–	−13.4	−39.8	−21.1	−17.6
Precision (%)	–	46.7	52.6	39.6	44.8