Fig. 1: Cox restricted cubical spline plot with risk of NRM by eGFR level.

The Cox-restricted cubical spline plot shows that the risk of NRM was significantly higher with an eGRF below 70. The left vertical line shows the eGFR 70 ml/min cutoff, while the bold horizontal down sloping line and the dotted lines above and below show the hazard ratio and both low and upper 95% confidence intervals are above 1.