Document Classification

Section Type: RESULTS

Text: Pulmonary artery pressure, the secondary end point, improved from the baseline of 98. 8 + / - 20. 5 to 78. 3 + / - 15. 3 mm Hg (P <. 0001), NYHA class improved from 2. 65 + / - 0. 59 to 1. 55 + / - 0. 51 (P <. 0001), exercise duration from 6. 4 + / - 3. 1 to 10. 2 + / - 2. 05 minutes (P <. 0001), and Mets achieved from 3. 32 + / - 1. 57 to 6. 04 + / - 1. 87 (P <. 0001) after treatment with sildenafil.