Shift work aggravates metabolic syndrome development among early-middle-aged males with elevated ALT

Table 1 Job contents for different job types/e-ALT of the workers in this investigation n (%)

Job title	Routine work activities	n = 996	e-ALT: no; pRSW: no (n = 496)	e-ALT: no; pRSW: yes (n = 310)	e-ALT: yes; pRSW: no (n = 119)	e-ALT: yes; pRSW: yes (n = 71)
Operator	On-site work	232 (23.3)	101	97	17	17
Technician	On-site work	422 (42.4)	158	178	40	46
Engineer	On-site work	159 (16.0)	131	2	24	2
Team leader	On-site work	85 (8.5)	33	29	18	5
Specialist	On-site work	22 (2.2)	16	1	5	0
Deputy manager	Management	42 (4.2)	31	1	10	0
General manager	Management	19 (1.9)	15	0	4	0
Director	Management	3 (0.3)	3	0	0	0
Guard	Security	8 (0.8)	6	1	1	0
Clerk	Office work	4 (0.4)	2	1	0	1

e-ALT: Elevated alanine aminotransferase; pRSW: Persistent rotating shift work.