Sampling strategy for interviews at NHS sites
| Wave | Site A | Site B | Site C | Site D | Site E | Site F | Total | ||||||
| First | Second | First | Second | First | Second | First | Second | First | Second | First | Second | ||
| Clinical or medical director responsible for perioperative services | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Local PQIP leads (surgery, anaesthesia, management, improvement) | 4 | 4 | 4 | 4 | 4 (leads for these areas as no PQIP leads) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 48 |
| Consultants (surgery) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Consultants (anaesthesia) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Trainees (surgery) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Trainees (anaesthesia) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Research nurses | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Nursing staff involved in perioperative care | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Allied health professoinals | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
| Total | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 144 |
PQIP, perioperative quality improvement programme