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. 2017 Sep 24;14(10):1109. doi: 10.3390/ijerph14101109

Table 1.

Demographic characteristics of the day and shift workers.

Variables Day Workers (n = 68) Shift Workers (n = 53)
Age, years
<30 31 (45.6) 28 (52.8)
30–39 31 (45.6) 21 (39.6)
≥40 6 (8.8) 4 (7.6)
Gender
Male 36 (52.9) 16 (30.2)
Female 32 (47.1) 37 (69.8)
Duration of employment, years
<10 48 (70.6) 35 (66.0)
10–19 16 (23.5) 14 (26.4)
≥20 4 (5.9) 4 (7.6)

The data are expressed as number and frequency (%).