Table 1. Characteristics of 232 occupational divers stratified by duration of career; ∗ 2nd medical refers to data collected from the divers' most recent medical examinations; BMI – body mass index .
| All(n = 232) | > 15 y(n = 73) | 10–15 y(n = 159) | |
| Male/Female (%) | 90/10 | 100 | 86/14 |
| non-smoker (%) | 74 | 70 | 75 |
| smoker and ex-smoker (%) | 26 | 30 | 25 |
| No. dives/year (at 2nd medical ∗) | 60 (0−350) | 55 (0−272) | 62 (0−350) |
| Age (at 2nd medical∗) | 48 (31−75) | 52 (38−75) | 46 (31−73) |
| Δ BMI (kg∙m-2) | 1.6 (-6.3−12.2) | 2 (-4.1−9.0) | 1.4 (-6.3−12.2) |
| Δ Age (years) | 13.6 (10−25) | 18.1 (15−25) | 11.6 (10−14) |
| Oxygen saturation (%) | 98 (1) | 97 (1) | 98 (1) |
| Employment | |||
| Scientific (%) | 35 | 30 | 36 |
| Commercial (%) | 19 | 24 | 17 |
| Instructor (%) | 17 | 9 | 21 |
| Construction (%) | 14 | 14 | 14 |
| Aquaculture (%) | 7 | 9 | 6 |
| Military/Police/Customs (%) | 4 | 4 | 4 |
| Filming (%) | 3 | 10 | 1 |
| HBU attendant (%) | 1 | 0 | 1 |