Clinical and demographic characteristics of the 72 boilermaker construction worker participants
| Observation hours | 2993 | |
|---|---|---|
| Arrhythmia events | ||
| Ventricular (beats/h) | ||
| Mean (SD) | 14 (69) | |
| Minimum, median, maximum | 0, 0, 877 | |
| Supraventricular (beats/h) | ||
| Mean (SD) | 1 (4) | |
| Minimum, median, maximum | 0, 0, 92 | |
| General* | ||
| Male | n (%) | 72 (100) |
| Age (years) | Mean (SD) | 38 (11) |
| Range | 19–60 | |
| Current smoker n (%) | 31 (43) | |
| Years as a boilermaker | Mean (SD) | 10 (12) |
| Range | 0–40 | |
| Diagnoses† | n (%) | |
| Cardiovascular | ||
| Angina pectoris | 1 (1) | |
| Ischaemic heart disease | 3 (4) | |
| Myocardial infarction | 4 (6) | |
| Hypertension | 17 (24) | |
| Respiratory | ||
| Chronic bronchitis | 9 (13) | |
| Asthma | 5 (7) | |
*At first enrolment.
†At least once during monitoring.