Graph pad prism v7.0 for mac osx

We performed a retrospective study of subdural drain usage in all consecutive patients receiving burr-hole drainage for CSDH at King’s College Hospital between January 2009 and January 2014. Patients were treated by clinical teams, and each team was directed by a Consultant Neurosurgeon who defined the standard operative procedure for the team. Patients who underwent burr-hole drainage between January 2010 and January 2014 were stratified into the ‘post-trial’ epoch (3 months after the Santarius et al. trial results were published [11 (link)]). Paediatric patients and patients with CSF diversions in situ were excluded. Data on patient demographics, subdural drain use and surgical complications were collected from the clinical notes. The primary outcome measure was re-operation for recurrent chronic subdural haematoma within 6 months. Statistical analysis was performed using SPSS v20 with chi-squared values derived from four-fold tables for binary data. A p value of < 0.05 was considered significant. Graph Pad Prism v7.0 for Mac OSX, GraphPad Software, La Jolla CA, USA, www.graphpad.com, was used for other calculations and in generating figures. To close the audit loop, these data were also collected retrospectively for all consecutive patients receiving burr-hole drainage for CSDH between August 2015 and January 2016 (6 months following presentation of the primary results).