• Kasper Højgaard Thybo, Janus Christian Jakobsen, Daniel Hägi-Pedersen, Niels Anker Pedersen, Jørgen Berg Dahl, Henrik Morville Schrøder, Hans Henrik Bülow, Jan Gottfrid Bjørck, Søren Overgaard, Ole Mathiesen, and Jørn Wetterslev.
• Department of Anaesthesiology, Næstved Hospital, Ringstedgade 61, 4700, Næstved, Denmark. khty@regionsjaelland.dk.
• Trials. 2017 Oct 10; 18 (1): 465.

BackgroundEffective postoperative pain management is essential for the rehabilitation of the surgical patient. The PANSAID trial evaluates the analgesic effects and safety of the combination of paracetamol and ibuprofen. This paper describes in detail the statistical analysis plan for the primary publication to prevent outcome reporting bias and data-driven analysis results.Methods/DesignThe PANSAID trial is a multicentre, randomised, controlled, parallel, four-group clinical trial comparing the beneficial and harmful effects of different doses and combinations of paracetamol and ibuprofen in patients having total hip arthroplastic surgery. Patients, caregivers, physicians, investigators, and statisticians are blinded to the intervention. The two co-primary outcomes are 24-h consumption of morphine and proportion of patients with one or more serious adverse events within 90 days after surgery. Secondary outcomes are pain scores during mobilisation and at rest at 6 and 24 h postoperatively, and the proportion of patients with one or more adverse events within 24 h postoperatively.DiscussionPANSAID will provide a large trial with low risk of bias regarding benefits and harms of the combination of paracetamol and ibuprofen used in a perioperative setting.Trial RegistrationClinicalTrials.org identifier: NCT02571361 . Registered on 7 October 2015.

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