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Table 5 Positive and negative predictive values at six months for predicting the ratings at 12 months

From: High-resolution CT scoring system-based grading scale predicts the clinical outcomes in patients with idiopathic pulmonary fibrosis

   at 12 months  
   worsened* Non-worsened  
at 6 months worsened 4 (66.7%) 2 (33.3%) 6
Non-worsened 15 (16.3%) 77 (83.7%) 92
   19 79 98
  1. *Worsened was defined based on 10% absolute decreasing changes in the FVC from baseline.
  2. Non-worsened indicated improved (≥ 10% increase) and stable (< 10% change) status.