Table 1

The relationship between shift work and HCC

Shift workN (%)Original HCC
Median (Q1–Q3)
(ng/g hair)
Original HCC
GM±GSD
(ng/g hair)
Total<40≥40
Fixed day shift127 (29.20)2.15 (1.55–3.21)2.33±1.652.32±1.672.34±1.65
Two shifts87 (20.00)3.61 (2.94–5.25)3.76±1.47*3.59±1.52†3.99±1.39‡
Three shifts64 (14.71)3.24 (2.01–4.59)3.15±1.64*3.18±1.66†3.12±1.63‡
Four shifts135 (31.03)3.84 (2.63–5.20)3.81±1.55*3.64±1.52†4.01±1.58‡
Others22 (5.06)3.38 (2.16–5.81)3.60±1.33*3.45±1.66†3.24±1.86‡
η20.1740.1450.211
  • η2: the effect size of the variance analysis.

  • *†‡: there was no significant difference between groups marked with the same letter.

  • GM±GSD, geometric mean±geometric SD; HCC, hair cortisol concentration.