After treatment , PPT decreased insignificantly in group I ( median -LSB- range -RSB- ; before : @ -LSB- @ - @ -RSB- kPa , afterwards : @ -LSB- @ - @ -RSB- kPa ) and increased insignificantly in group II ( before : @ -LSB- @ - @ -RSB- kPa ; afterwards : @ -LSB- @ - @ -RSB- kPa ) .