Table 2. Demographic information by group.
| Group 1 | Group 2 | Group 3 | ||
|---|---|---|---|---|
| Age (mean; range) | 40 (29–62) | 39 (33–50) | 41 (24–52) | |
| Gender | Male | 6 | 7 | 6 |
| Female | 3 | 2 | 2 | |
| Crew position | Cabin crew | 6 | 6 | 5 |
| Purser | 2 | 1 | 1 | |
| Senior Purser | 1 | 2 | 2 | |
| Work experience (mean; range) | 16 (7–43) | 13.5 (8–20) | 16.5 (4–30) | |
| Average work hours per month (mean; range) | 110 (90–133) | 120 (90–120) | 120 (100–140*) | |
| Years ULR experience (mean; range) | 2 (1–3) | 3 (1–3) | 3 (1.4–4**) | |
| Took part in ULR field study***: Yes | 7 | 3 | 3 | |
| Number of participants | 9 | 9 | 8 | |
* Excludes 1 outlier (27 h); ** excludes 1 outlier (13 yr); *** van den Berg et al., 2015