Table 1.

Basic characteristics of the workers in this study (n = 376).

Variables
age [mean (SD)]	47.98 (6.28)
Sex
Male (%) Female (%)	355 (94.4%) 22 (5.6%)
Worktime [mean (SD)]	9.35 (2.19)
Work years [mean (SD)]	21.98 (10.44)
Hyper pressure [mean (SD)]	124.53 (19.02)
Lower pressure [mean (SD)] Sleep time [mean (SD)]	91.38 (72.90) 6.80 (1.25)
Alcohol (%)
Almost every day 2–3 times a week A few times a month Never	74 (19.68) 5 (0.01) 168 (44.68) 129 (34.30)
Smoke (%)
Yes	239 (63.6)
No	137 (36.4)
Olfactory test grade (%)
Normal	158 (42.0)
Mild olfactory impairment	82 (21.8)
Server olfactory impairment	83 (22.1)
Olfactory loss	53 (14.1)
UPSIT score [mean (SD)]	29.91 (6.06)
OMP [median (IQR)]	0.98 [0.33, 1.34]
Al [median (IQR)]	3.02 [1.42, 5.84]
V [median (IQR)]	0.03 [0.01, 0.04]
Cr [median (IQR)]	0.33 [0.24, 0.47]
Fe [median (IQR)]	3.93 [2.30, 6.43]
Co [median (IQR)]	0.03 [0.01, 0.06]
Cu (median [IQR])	2.12 [1.48, 3.11]
Zn [median (IQR)]	122.57 [76.53, 179.44]
As [median (IQR)]	7.63 [5.11, 12.04]
Se [median (IQR)]	8.80 [6.07, 12.29]
Mo [median (IQR)]	16.43 [11.06, 24.99]
Cd [median (IQR)]	0.14 [0.05, 0.33]
Sb [median (IQR)]	0.30 [0.26, 0.36]
Ba [median (IQR)]	0.70 [0.51, 1.11]
Pb [median (IQR)]	0.28 [0.19, 0.42]