Table 1.
Delphi participant characteristics and response rates
| Round 1 | Round 2 | |
|---|---|---|
| Participation | ||
| Total number of experts invited | 231 | 33 |
| Did not respond | 192 | 2 |
| Started but did not finish | 6 | 5 |
| Declined to participate | – | 1 |
| Total number of experts who completed survey | 33 | 27 |
| Response rate (%) | 14.28 | 81.81 |
| Expert characteristics | ||
| Country | n % | n % |
| United Kingdom | 10 (30.3) | 9 (33.3) |
| United States of America | 5 (15.2) | 2 (7.4) |
| Australia | 4 (12.1) | 4 (14.8) |
| Spain | 4 (12.1) | 3 (11.1) |
| Canada | 3 (9.1) | 3 (11.1) |
| Ireland | 3 (9.1) | 3 (11.1) |
| Belgium | 2 (6.1) | 1 (3.7) |
| Germany | 1 (3.0) | 1 (3.7) |
| Norway | 1 (3.0) | 1 (3.7) |
| Backgrounda | n (%) | n (%) |
| Epidemiology/public health | 12 (36.4) | 10 (37.0) |
| Medicine | 7 (21.2) | 6 (22.2) |
| Nursing | 7 (21.2) | 5 (18.5) |
| Psychology | 5 (15.2) | 4 (14.8) |
| Sociology | 3 (9.1) | 3 (11.1) |
| Diet/nutrition | 2 (6.1) | 2 (7.4) |
| Pharmacy | 1 (3.0 | 1 (3.7) |
| Others (social work, sociology, health service research) | 8 (24.2) | 7 (25.9) |
| Positionb | n (%) | n (%) |
| Researcher | 28 (84.8) | 22 (81.5) |
| Health‐care provider | 6 (18.2) | 5 (18.5) |
| Academic | 4 (12.1) | 3 (11.1) |
| Patient representative | 3 (9.1) | 3 (11.1) |
| Policymaker | 2 (6.1) | 2 (7.4) |
a
Some participants had backgrounds in more than a single field.
b
Some participants had more than a single position.