PANSAID-PAracetamol and NSAID in combination: detailed statistical analysis plan for a randomised, blinded, parallel, four-group multicentre clinical trial

Trials. 2017 Oct 10;18(1):465. doi: 10.1186/s13063-017-2203-1.


Background: Effective 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/design: The 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.

Discussion: PANSAID 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 registration: identifier: NCT02571361 . Registered on 7 October 2015.

Keywords: Benefit; Detailed statistical analysis plan; Harm; Ibuprofen; Multimodal analgesia; Paracetamol; Postoperative pain; Randomised controlled trial; Total hip arthroplasty.

Publication types

  • Comparative Study
  • Multicenter Study
  • Randomized Controlled Trial

MeSH terms

  • Acetaminophen / administration & dosage*
  • Acetaminophen / adverse effects
  • Analgesics, Non-Narcotic / administration & dosage*
  • Analgesics, Non-Narcotic / adverse effects
  • Analgesics, Opioid / administration & dosage
  • Anti-Inflammatory Agents, Non-Steroidal / administration & dosage*
  • Anti-Inflammatory Agents, Non-Steroidal / adverse effects
  • Arthroplasty, Replacement, Hip / adverse effects*
  • Clinical Protocols
  • Data Interpretation, Statistical
  • Denmark
  • Drug Combinations
  • Female
  • Humans
  • Ibuprofen / administration & dosage*
  • Ibuprofen / adverse effects
  • Male
  • Morphine / administration & dosage
  • Pain Measurement
  • Pain, Postoperative / diagnosis
  • Pain, Postoperative / etiology
  • Pain, Postoperative / prevention & control*
  • Research Design
  • Risk Factors
  • Time Factors
  • Treatment Outcome


  • Analgesics, Non-Narcotic
  • Analgesics, Opioid
  • Anti-Inflammatory Agents, Non-Steroidal
  • Drug Combinations
  • Acetaminophen
  • Morphine
  • Ibuprofen

Associated data