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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)  
City 0 (0) 41 (37)  
Smoking Yes 48 (38) 28 (25) 0.05
No 79 (62) 83 (75)  
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)  
Asthma-like symptoms Yes 8 (6) 15 (14) 0.10
No 119 (94) 96 (86)  
Allergies Yes 7 (6) 11 (10) 0.3
No 120 (94) 100 (90)  
Eczema Yes 29 (23) 26 (23) 1
No 98 (77) 85 (77)  
Age [years]   44 (16) 40 (16) 0.020
B.M.I. [kg/m2]   23.5 (3.6) 23 (4.4) 0.353
Cotinine [ng/mg crea]   12.84 (42.47) 3.53 (18.29) < 0.001
  1. Differences between exposed and controls were tested using Χ2 and Wilcoxon tests for categorical and continue variables, respectively. Age, B.M.I. and cotinine are reported as Median value (IQR)