Table 1.

The relationship between shift work and HCC

Shift work	N (%)	Original HCC Median (Q1–Q3) (ng/g hair)	Original HCC GM±GSD (ng/g hair)
			Total	<40	≥40
Fixed day shift	127 (29.20)	2.15 (1.55–3.21)	2.33±1.65	2.32±1.67	2.34±1.65
Two shifts	87 (20.00)	3.61 (2.94–5.25)	3.76±1.47*	3.59±1.52†	3.99±1.39‡
Three shifts	64 (14.71)	3.24 (2.01–4.59)	3.15±1.64*	3.18±1.66†	3.12±1.63‡
Four shifts	135 (31.03)	3.84 (2.63–5.20)	3.81±1.55*	3.64±1.52†	4.01±1.58‡
Others	22 (5.06)	3.38 (2.16–5.81)	3.60±1.33*	3.45±1.66†	3.24±1.86‡
η2			0.174	0.145	0.211

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.