Characteristics | Acute N=30 | Subacute N=39 | All N=69 | P value |
Age, mean (SD) | 45.1 (8) | 47.0 (12) | 46.2 (10) | 0.436 |
Men | 25 (83) | 33 (85) | 58 (84) | 0.570 |
Smoking: | 0.061 | |||
Current | 5 (17) | 9 (23) | 14 (20) | |
Ex | 10 (33) | 4 (10) | 14 (20) | |
Non | 15 (50) | 26 (67) | 41 (59) | |
Occupational groups* | ||||
Stationary plant and machine operators | 4 (13) | 19 (49) | 23 (33) | 0.002 |
Metal, machinery and related trade workers | 7 (23) | 4 (10) | 11 (16) | 0.190 |
Building and related trade workers (excluding electricians) | 4 (13) | 4 (10) | 8 (12) | 0.720 |
Drivers and mobile plant operators | 2 (7) | 3 (8) | 5 (7) | 1.000 |
Science and engineering-associated professions | 2 (7) | 3 (8) | 5 (7) | 1.000 |
Market-oriented skilled agricultural workers | 1 (3) | 3 (8) | 4 (6) | 0.627 |
Electrical and electronics trade workers | 3 (10) | 0 (0) | 3 (4) | -† |
Production and specialised services managers | 0 (0) | 2 (5) | 2 (3) | – |
Cleaners and helpers | 2 (7) | 0 (0) | 2 (3) | – |
Others‡ | 5 (17) | 1 (3) | 6 (9) | – |
The data are presented as numbers (%), if not otherwise stated. P values were calculated using independent variables t-test for age, χ2 test for the distribution of smoking status, and Fisher’s exact test for other classified variables. Each occupational group was compared with all other occupational groups.
*Classified by International Standard Classification of Occupations on two-digit level. P value is calculated for distribution of occupational classes.
†P values missing due to low number of cases.
‡Only one case per occupation group.