... pump inhibitors for the prevention of non-steroidal anti-inflammatory drug ulcers: a pharmacoeconomic analysis linked to a case-control studyHarald E Vonkeman1, Louise MA Braakman-Jansen2, ... using the software package S-plus (TIBCOSoftware Inc., Palo Alto, California, USA) professional version6.0. Cost effectiveness To calculate the incremental cost effectiveness ratio(expressed as ... NSAIDs [17,18]. While these findings fromprevious studies vary, they all used actual primary clinical datafrom trials and applied them to an economic model. Thesedata may however not always...