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. 2016 Feb 6;13(2):204. doi: 10.3390/ijerph13020204

Table 2.

Demographic characteristics of the study population *.

Characteristics Individual Petrol Stations
A B C D E F G H
Age (year) 29.25 ± 8.20 27.82 ± 7.61 28.82 ± 4.05 28.29 ± 8.70 27.00 ± 5.40 24.87 ± 4.72 26.25 ± 3.58 31.54 ± 6.13
Gender
Male (%) 5(41.7) 5(45.5) 1(9.1) 8(57.1) 6(46.2) 8(53.3) 1(12.5) 4(30.8)
Female (%) 7(58.3) 6(54.5) 10(90.9) 6(42.9) 7(53.8) 7(46.7) 7(87.5) 9(69.2)
Body weight (kg) 55.13 ± 8.87 52.68 ± 4.12 61.09 ± 6.71 56.46 ± 6.79 54.53 ± 8.85 55.2 ± 5.29 62.65 ± 9.97 58.85 ± 9.33
Type of job
Operating workers (%) 8(66.7) 6(54.5) 7(63.6) 9(64.3) 8(61.5) 10(66.7) 5(62.5) 8(61.5)
Support staff (%) 4(33.3) 5(45.5) 4(36.4) 5(35.7) 5(38.5) 5(33.3) 3(37.5) 5(38.5)
Working time (h/day) 8 8 8 8 8 8 8 8
Length of exposure (year) 2.63 ± 2.50 4.36 ± 4.12 6.32 ± 3.13 2.50 ± 2.01 4.27 ± 3.48 3.00 ± 2.80 4.88 ± 4.19 5.92 ± 3.77

* The number of subjects at P. stations A, B, C, D, E, F, G, and H were 12, 11, 11, 14, 13, 15, 8 and 13, respectively.