Table 4.

Sampling duration and GFR estimates stratified by eGFR for 10-h GFRa

Sampling DurationMean GFR (ml/min/1.73 m2)95% CIRatio Compared to 10-h GFR95% CI of RatioP
eGFR stratum >30 ml/min/1.73m2
10 h40.333.2 to 48.9
9 h41.234.1 to 49.81.020.92 to 1.14>0.2
8 h42.134.8 to 50.91.040.94 to 1.16>0.2
7 h43.736.1 to 52.81.080.97 to 1.210.15
6 h45.237.4 to 54.71.121.01 to 1.250.037
5 h47.239.0 to 57.11.171.05 to 1.310.004
4 h49.340.7 to 59.61.221.10 to 1.36<0.001
3 h53.143.8 to 64.41.321.18 to 1.48<0.001
2.5 h56.746.9 to 68.61.411.26 to 1.57<0.001
2 h62.351.5 to 75.31.541.39 to 1.72<0.001
eGFR stratum <30 ml/min/1.73m2
10 h22.218.4 to 26.9
9 h23.619.5 to 28.61.060.96 to 1.18>0.2
8 h24.820.5 to 30.01.121.01 to 1.240.037
7 h25.921.4 to 31.31.161.05 to 1.290.004
6 h27.522.7 to 33.31.241.12 to 1.37<0.001
5 h30.325.0 to 36.61.361.23 to 1.51<0.001
4 h33.427.6 to 40.41.501.36 to 1.67<0.001
3 h39.432.5 to 47.81.771.59 to 1.98<0.001
2.5 h44.636.9 to 54.02.011.81 to 2.23<0.001
2 h50.241.5 to 60.72.262.04 to 2.51<0.001
  • a Mean GFR calculated using a nominal mixed model with maximal likelihood estimates.