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. 2017 Sep 12;3(9):e00400. doi: 10.1016/j.heliyon.2017.e00400

Table 2.

Demographic characteristics of the study population.


Control (n = 36)
Gold miners (n = 53)
p value
n (%) Mean ± SE n (%) Mean ± SE
Age (years) 35.19 ± 2.83 34.38 ± 1.51 0.783
Sex <0.001
 Men 12 (33.33) 51 (96.23)
 Women 24 (66.67) 2 (3.77)
Time of exposure (years) 7.72 ± 1.43
Smoking habit 0.585
 Non smoker 7 (22.58) 15 (28.30)
 Ex-smoker 22 (70.97) 32 (60.38)
 Smoker 2 (6.45) 6 (11.32)
 Cumulative smoking: Package/year 2.90 ± 1.10 4.52 ± 2.37 1.000
Frequency of fish consumption 0.01
 Never 0 3 (5.66)
 Once per month 7 (19.44) 25 (47.17)
 Once per week 11 (30.56) 14 (26.42)
 2–4 times per week 14 (38.89) 10 (18.87)
 Everyday 4 (11.11) 1 (1.89)

SE: Standard Error. χ2 test for frequencies. Mann–Whitney U-test.