|   | 
        Baseline | 
        2 months | 
        4 months | 
       
      
        |   | 
          | 
          | 
        95% CI | 
          | 
          | 
        95% CI | 
          | 
          | 
        95% CI | 
       
      
        | Variables | 
        AUC | 
        p | 
        LB | 
        UB | 
        AUC | 
        p | 
        LB | 
        UB | 
        AUC | 
        p | 
        LB | 
        UB | 
       
      
        | uNGAL  | 
        0.83 | 
         0.001 | 
        0.74 | 
        0.92 | 
        0.70 | 
        0.002 | 
        0.59 | 
        0.81 | 
        0.79 | 
        <0.001 | 
        0.68 | 
        0.90 | 
       
      
        | Serum albumin | 
        0.23 | 
        0.004 | 
        0.13 | 
        0.33 | 
        0.24 | 
        <0.001 | 
        0.14 | 
        0.35 | 
        0.23 | 
        <0.001 | 
        0.12 | 
        0.34 | 
       
      
        | Serum creatinine | 
        0.59 | 
        0.14 | 
        0.46 | 
        0.72 | 
        0.57 | 
        0.25 | 
        0.43 | 
        0.71 | 
        0.70 | 
        0.003 | 
        0.57 | 
        0.84 | 
       
      
        | eGFR | 
        0.40 | 
        0.15 | 
        0.27 | 
        0.53 | 
        0.40 | 
        0.16 | 
        0.27 | 
        0.54 | 
        0.29 | 
        0.004 | 
        0.16 | 
        0.43 | 
       
      
        | Anti dsDNA Ab titres | 
        0.48 | 
        0.78 | 
        0.35 | 
        0.61 | 
        0.47 | 
        0.74 | 
        0.34 | 
        0.61 | 
        0.53 | 
        0.71 | 
        0.35 | 
        0.70 | 
       
      
        | Serum C3 | 
        0.39 | 
        0.09 | 
        0.26 | 
        0.51 | 
        0.46 | 
        0.56 | 
        0.33 | 
        0.58 | 
        0.39 | 
        0.18 | 
        0.25 | 
        0.53 | 
       
      
        | Serum C4 | 
        0.43 | 
        0.35 | 
        0.30 | 
        0.56 | 
        0.42 | 
        0.27 | 
        0.30 | 
        0.55 | 
        0.46 | 
        0.67 | 
        0.30 | 
        0.62 | 
       
      
        | Haematuria | 
        0.62 | 
        0.08 | 
        0.48 | 
        0.76 | 
        0.54 | 
        0.51 | 
        0.41 | 
        0.67 | 
        0.62 | 
        0.08 | 
        0.48 | 
        0.76 | 
       
      
        | Proteinuria (uPCI) | 
        0.94 | 
        <0.001 | 
        0.90 | 
        0.99 | 
        0.92 | 
        <0.001 | 
        0.85 | 
        0.99 | 
        0.88 | 
        <0.001 | 
        0.78 | 
        0.97 | 
       
      
        | SLEDAI-2K (renal score) | 
        0.96 | 
        <0.001 | 
        0.90 | 
        1 | 
        0.84 | 
        <0.001 | 
        0.75 | 
        0.92 | 
        0.84 | 
        <0.001 | 
        0.75 | 
        0.93 | 
       
       
    AUC:    Area Under the Curve; CI: Confidence Interval; LB: Lower Bound; UB: Upper    Bound; C3: Complement 3; C4: Complement 4; uPCI: Urine Protein Creatinine Index;    SLEDAI-2K: Systemic Lupus Erythematosus Disease Activity Index-2K |