Table 3

Summary of feasibility results

Feasibility outcomeTargetResult
Recruitment rate8 per 100 000 population per year (ie, 120 patients recruited)
  • 5.1 (95% CI 4.1 to 6.4) per 100 000 population per year

  • 77 enrolled patients.

Major and minor non-compliances0% and ≤10%
  • 0%—major non-compliances

1.3%—minor non-compliance
Adherence to the allocation scheduleTarget ≥90%
  • 100% adherence to allocation schedule

Adherence to treatment in the CPAP armTarget ≥75%
  • 74%—CPAP fully delivered as planned

Retention at 30 daysTarget ≥90%
  • 100%—follow-up for all feasibility endpoints and 30-day mortality

Data completenessTarget ≥90%Data completeness for outcomes:
  • 100%—feasibility outcomes

  • 100%–30-day mortality

  • 81%–30-day intubation

  • 84%—admission to critical care

  • 99%—clinician assessed breathlessness

  • 86%—length of hospital stay

  • 85%—baseline EQ-5D-5L*

  • 71%–30-day EQ-5D-5L*

  • 73%–30-day resource use*

  • *Of alive patients.

  • CPAP, continuous positive airways pressure; EQ-5D-5L, EuroQOL-5D-5L Value Sets.