Table 1 Demographics of the sampling population presented as exposed and control groups
From: Oxidative stress induction in woodworkers occupationally exposed to wood dust and formaldehyde
|  | Exposed n = 127 (100%) | Controls n = 111 (100%) | p-value | |
|---|---|---|---|---|
Residence | Countryside | 117 (92) | 29 (26) | < 0.001 |
Suburb | 10 (8) | 41 (37) | Â | |
City | 0 (0) | 41 (37) | Â | |
Smoking | Yes | 48 (38) | 28 (25) | 0.05 |
No | 79 (62) | 83 (75) | Â | |
Working years | 0-5 | 35 (28) | 41 (37) | 0.14 |
5–10 | 21 (16) | 22 (20) |  | |
> 10 | 71 (56) | 48 (43) |  | |
Wheezing | Yes | 18 (14) | 20 (18) | 0.53 |
No | 109 (86) | 91 (82) | Â | |
Asthma-like symptoms | Yes | 8 (6) | 15 (14) | 0.10 |
No | 119 (94) | 96 (86) | Â | |
Allergies | Yes | 7 (6) | 11 (10) | 0.3 |
No | 120 (94) | 100 (90) | Â | |
Eczema | Yes | 29 (23) | 26 (23) | 1 |
No | 98 (77) | 85 (77) | Â | |
Age [years] | Â | 44 (16) | 40 (16) | 0.020 |
B.M.I. [kg/m2] | Â | 23.5 (3.6) | 23 (4.4) | 0.353 |
Cotinine [ng/mg crea] |  | 12.84 (42.47) | 3.53 (18.29) | < 0.001 |