Trial By Error: BMJ Has Corrected the REGAIN Trial Paper–But Not the Editorial or Systematic Review Touting REGAIN’s Findings
By David Tuller, DrPH Last February, The BMJ published a paper called “Clinical effectiveness of an online supervised group physical and mental health rehabilitation programme for adults with post-covid-19 condition (REGAIN study): multicentre randomised controlled trial,” from McGregor et al. The study purported to have proven that this multi-disciplinary intervention was “clinically effective” in reducing …