Table 3.

Comparison of patients with a measured creatinine clearance (CL_CR) greater than 80 or 120 ml min⁻¹ 1.73 m⁻² and lower than 80 ml min⁻¹ 1.73 m⁻²

	CLCR (>120 ml min−1 1.73 m−2)	CLCR > (80 ml min−1 1.73 m−2)	CLCR (<80 ml min−1 1.73 m−2)	P#	P§
n	15 (62.5%)	27 (75%)	9 (25%)
Age (years)	34 ± 12	47 ± 20	74 ± 11	0.0025	<0.0001
Gender (male)	9 (60%)	17 (62.96%)	5 (55.55%)	0.73	0.7358
Actual body weight (kg)	67 ± 16	71 ± 18	72 ± 15	0.939	0.4259
Ideal body weight (kg)	64 ± 10	65 ± 11	66 ± 13	0.899	0.6441
Burn area (%)	26 ± 20	23 ± 17	18 ± 11	0.5206	0.3270
Baux index	60 ± 22	70 ± 24	92 ± 16	0.012	0.0008
UBS	67 ± 51	57 ± 47	54 ± 26	0.8332	0.4824
Tobiasen index	7 ± 2	7 ± 2	8 ± 1	0.2210	0.1356
Days preceding burn injury	11 ± 6	13 ± 7	19 ± 15	0.314	0.4016
Mechanical ventilation	4 (26.7%)	7 (25.9%)	3 (33.3%)	0.735	0.7358
Serum creatinine (µmol l−1)	70.06 ± 23.92	71.8 ± 21.5	88.9 ± 24.1	0.1924	0.0758
measured creatinine clearance (ml min−1)	173.8 ± 47.65	144.7 ± 48.8	59.5 ± 21.9	<0.0001	<0.0001
Urinary creatinine excretion (mg 24 h−1 1.73 m−2)	1890 ± 490	1593 ± 537	786 ± 259	0.0003	0.0001
Urinary creatinine excretion (mg kg−1 24 h−1)	29.2 ± 7.5	24.0 ± 8.8	11.6 ± 3.8	0.0012	0.0001
Cockcroft-Gault (ml min−1 1.73 m−2)	124.9 ± 35.6	113.4 ± 52.8	66.3 ± 32.7	0.0171	0.0006
Robert (ml min−1 1.73 m−2)	88.8 ± 16.7	78.1 ± 20.7	50.8 ± 16.1	0.001	<0.0001
Kirkpatrick (ml min−1 1.73 m−2)	113.4 ± 24.5	101.0 ± 30.4	64.7 ± 30.3	0.0038	0.0003
Simplified MDRD (ml min−1 1.73 m−2)	119 ± 36.6	106.4 ± 36.3	72.3 ± 30.1	0.0159	0.0039

^#: comparison between less and more than 80 ml min⁻¹ 1.73 m⁻².

^§: comparison between less than 80 ml min⁻¹ 1.73 m⁻² more than 120 ml min⁻¹ 1.73 m⁻².