After treatment , PPT decreased insignificantly in group I ( median [ range ] ; before : 224.0 [ 121.0 - 52937 ] kPa , afterwards : 186.4 [ 101.4 - 526.5 ] kPa ) and increased insignificantly in group II ( before : 207.6 [ 170.0 - 320.5 ] kPa ; afterwards : 235.4 [ 163.5 - 349.9 ] kPa ) .