Fig. 4From: A more accurate method acquirement by a comparison of the prediction equations for estimating glomerular filtration rate in Chinese patients with obstructive nephropathyComparison of the mean bias and precision over subgroups stratified by gender, age, and measured GFR. The mean bias was calculated as the mean of the differences between the estimated and measured GFR per subgroup, whereas the precision was the SD of this differenceBack to article page