The call, up front. Health anxiety is chronic, common and expensive, and it lands where it costs most: nearly one in five general medical outpatients meets the criteria. Individual CBT (cognitive behavioural therapy) treats it, with a large and durable effect. But individual delivery doesn’t scale. The group model would scale at the lowest cost per patient. And it is the one delivery format with no published randomized trial (RCT). The gap is not a therapy. It is the trial that would let payers fund the cheap one.
The gap
The market funds what it can prove. Individual CBT has the evidence and none of the throughput (the capacity to treat many patients); group CBT has the throughput and none of the evidence. The decision a health system faces is which model to reimburse, and right now the affordable one is unfundable.
The bankable asset isn't a new therapy: it's the trial. Run the rigorous group-CBT RCT and you manufacture the reimbursement case for the lowest-cost-per-patient treatment in the category.
Source: Hedman 2011 (BJPsych); Cooper 2017 (Behav Cogn Psychother); Eilenberg 2016 & Hoffmann 2021 (Psychol Med); group-CBT trial NCT02131883, registry re-checked Jul 2026
Bars are between-group Cohen's d (effect size: how big the improvement is) versus control on validated health-anxiety measures, drawn from separate randomized trials: a rough guide to each format's evidence, not a head-to-head comparison. The Group CBT bar is intentionally empty: the one registered group-only CBT trial (NCT02131883) reached completion in January 2019 and has published no peer-reviewed outcomes as of 2026.
Source: GAPTIQ engine: challenge decomposition
- 2007Cochrane review: CBT helps health anxiety, but on six small trials
- 2014CHAMP RCT (444 patients) proves individual CBT works and lasts, to 5 and 8 years
- 2019The one registered group-CBT RCT (NCT02131883) reaches completion
- Jul 2026Registry check: still no results posted and no linked publication, seven years after completion. The gap is intact
Source: Cochrane 2007; Tyrer et al. (CHAMP) 2014; ClinicalTrials.gov NCT02131883, re-checked Jul 2026
The move
Whoever runs the rigorous group-CBT trial doesn’t publish a paper: they manufacture the reimbursement case for the lowest-cost-per-patient model in a category that already drains health systems. The clinical work is done; the evidence is the product. The trial that has sat unpublished since 2019 is the whole opportunity.
Source: Outcome of CBT for Patients With Severe Health Anxiety Treated in Group Only: A RCT (NCT02131883), ClinicalTrials.gov, registry re-checked Jul 2026 (status: completed Jan 2019, no results posted). Surfaced by the GAPTIQ engine.



