Table A1

Variables and items

VariableIndicatorItem
WorkloadWL1I have to work constantly; I cannot take breaks beyond strict regulations
WL2I often work with annoying interruptions
WL3I have trouble forgetting the problems of my job
WL4My work affects my personal relationships
WL5My job has a big impact on my emotions
Work pressureWP1I have to work very fast
WP2I have too much work to do
WP3I have to hurry to get things done
AutonomyA1Able to use personal initiative or judgement in carrying out your work?
A2Able to make a lot of decisions on your own in your work?
A3Given the authority to make your own decisions?
Self-efficacySE1I am confident that I can handle any safety issues
SE2I can always solve safety issues if I try hard enough
SE3Due to my training, I know how to handle safety issues
SE4When I am confronted with a safety issue, I can usually find several ways to handle the issue
Occupational stressO1I am asked to do another work before finishing the work I am doing
O2I feel myself responsible for co-workers
O3My work requires a long-lasting concentration
O4I have to do various jobs simultaneously
Sleep problemSP1I have difficulty falling asleep
SP2I have difficulty in staying asleep
SP3I have difficulty staying awake (during work)
SP4I have restless or disturbed sleep
FatigueF1I often fear waking up to another day onboard
F2I often wonder how long I can keep working at sea
F3I feel I do not get to do anything else in my life besides work
F4My job at sea takes all of my energy from me

Source(s): The authors

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