| Measured | Estimated | |||||
---|---|---|---|---|---|---|---|
bSCr back-calculated from GFR | bSCr estimated directly | ||||||
SCr | bSCrGFRSchwartz120 (reference) | bSCrGFRPottel120 | bSCrGFRSchwartz137 | bSCrupperlimit | bSCrheightCC | bSCrageCC | |
Mean (SD) (mg/dL) | 0.29 (0.08) | 0.31 (0.05) | 0.29 (0.05) | 0.28 (0.04) | 0.40 (0.06) | 0.29 (0.04) | 0.29 (0.04) |
Median (IQR) (mg/dL) | 0.28 (0.23, 0.33) | 0.31 (0.28, 0.34) | 0.28 (0.26, 0.30) | 0.27 (0.25, 0.30) | 0.39 (0.35, 0.42) | 0.28 (0.26, 0.31) | 0.28 (0.26, 0.30) |
Wilcoxona | – | *** | NS | NS | *** | NS | NS |
Min, max (mg/dL) | 0.19, 0.56 | 0.23, 0.34 | 0.22, 0.48 | 0.20, 0.44 | 0.35, 0.71 | 0.22, 0.44 | 0.23, 0.46 |
Correlation, SCr (r) | – | 0.495 | 0.485 | 0.495 | 0.407 | 0.495 | 0.485 |
Bias (mg/dL) | – | 0.025*** | −0.002 (NS) | −0.014*** | 0.11*** | −0.002 (NS) | −0.002 (NS) |
Precision (mg/dL) | – | 0.07 | 0.07 | 0.07 | 0.08 | 0.07 | 0.07 |
Accuracy | |||||||
 P10, % | – | 24% | 35% | 33% | 8% | 29% | 35% |
 P30, % | – | 71% | 79% | 82% | 33% | 80% | 78% |
Proportional Bias | – | −0.66 ± 0.06 *** | − 0.70 ± 0.06*** | −0.81 ± 0.06*** | −0.35 ± 0.07*** | −0.91 ± 0.06*** | −0.88 ± 0.06*** |