Table 2.
Respondent characteristics (N = 334)
| Item | N (valid %) |
|---|---|
| Trial population (self-report) | |
| Children ( < 18 years) only | 71 (21.3%) |
| Older adults ( > 65 years) only | 46 (13.8%) |
| Neither of the above | 217 (65%) |
| Region of Residence* | |
| USA | 103 (35.8%) |
| UK | 81 (28.1%) |
| Non-UK Europe | 62 (21.5%) |
| Australia or New Zealand | 35 (12.2%) |
| Canada | 13 (4.5%) |
| Other | 6 (2.1%) |
| Missing | 46 |
| Gender | |
| Male | 114 (39.7%) |
| Female | 173 (60.3%) |
| Prefer not to disclose or missing | 47 |
| Age | |
| 25–35 years | 6 (2.0%) |
| 36–45 years | 49 (16.7%) |
| 46–55 years | 84 (28.6%) |
| 56–65 years | 94 (32.0%) |
| > 65 years | 61 (20.7%) |
| Missing | 40 |
| Racial or ethnic group* | |
| White | 256 (89.5%) |
| South Asian (Indian, Pakistani, Sri Lankan) | 13 (4.5%) |
| Chinese | 3 (1.0%) |
| Black | 6 (2.1%) |
| Latin American/Hispanic | 4 (1.4%) |
| Arab | 1 (0.3%) |
| West Asian (Iranian, Afghan) | 1 (0.3%) |
| Korean | 1 (0.3%) |
| Japanese | 1 (0.3%) |
| Other (specified text) | 2 (0.7%) |
| Prefer not to disclose or missing | 48 |
| Stage of research career | |
| Early career researcher (within 5 years of first academic appointment) | 13 (4.4%) |
| Mid-career researcher (6–15 years since first academic appointment) | 67 (22.7%) |
| Late career researcher ( > 15 years since first academic appointment) | 203 (68.8%) |
| Retired or Professor Emeritus | 8 (2.7%) |
| Other (e.g., no academic appointment) | 4 (1.4%) |
| Missing | 39 |
| Reported years of PPI experience | |
| 1–3 years | 12 (4.1%) |
| 4–10 years | 95 (32.1%) |
| > 10 years | 189 (63.9%) |
| Missing | 38 |
* Multiple selections allowed