Schedule of events for patient-participants
| Visit | Call-out (baseline) | 48 h | Day 14 | Day 30 | Month 6 |
| Day | 0 | 2 (±0 days) | 14 (±7 days) | 30 (±7 days) | 183 (±7 days) |
| Procedure/assessment | |||||
| Inclusion/exclusion criteria assessment | x | ||||
| Call-out informed consent | x | ||||
| NRS 0–10 breathlessness every 2 min (patient) | x | ||||
| Routinely collected paramedic data | x | ||||
| Demographic measures (patient and carer) | x | ||||
| Index ambulance call-out outcome | x | ||||
| Further call-outs in 48 h after index call-out | x | ||||
| Follow-up informed consent | x | ||||
| Interview (patient and carer) | x | ||||
| Health service utilisation questionnaire (patient) | x | x | x | ||
| SF-36 (patient) | x | x | x | ||
| CRQ-Dyspnoea Questionnaire (patient) | x | x | x | ||
NRS: numerical rating scale; SF-36: Short Form 36; CRQ: Chronic Respiratory Questionnaire.