Table 1 Demographic characteristics, exposure to fine particulate matter (PM2.5) and meteorological conditions (temperature and humidity) of 78 study subjects (66 welding workers and 12 office workers).

From: Urinary neutrophil gelatinase-associated lipocalin is associated with heavy metal exposure in welding workers

 

Welding workers (N = 66)

Office workers (N = 12)

P-value

Male (%)

100

8

0.018*

Age, mean ± SD (years)

51.0 ± 9.7

48.2 ± 15.3

0.148

Body-mass index, mean ± SD (kg/m2)

23.9 ± 3.1

23.4 ± 2.5

0.892

Smoking (%)

14

8

0.354

Alcohol consumption (%)

27

33

0.487

8-h mean PM2.5, mean ± SD (μg/m3)

50.3 ± 32.8

27.4 ± 16.2

0.019*

8-h mean temperature, mean ± SD (°C)

27.5 ± 2.6

24.1 ± 2.1

0.116

8-h mean humidity, mean ± SD (%)

65.9 ± 5.1

63.1 ± 3.3

0.083

  1. *P-value < 0.05 for comparison between welding and office workers.
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