In paediatric patients on dialysis (30% to 50% reduction in glomerular filtration rate) within age ranges of 5 to 11 years and 12 to 18 years, the mean weight-normalised CL/ F was larger for younger paediatric patients (580 ml/ h/ kg) than for older paediatric patients (450 ml/ h/ kg) as compared with adults (287 ml/ h/ kg).