RESULTS	At the 6-month follow-up , patients with dissection of any grade after treatment with PCBs had significantly less late lumen loss ( 0.4 mm ) than patients with dissection after treatment with uncoated balloons ( 1.9 mm , p = 0.001 ) and a lower degree of stenosis ( 20 % vs. 51 % , respectively ; p = 0.003 ) .\