Table 1 Inclusion and exclusion criteria

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• Study subject was a worker on ship, a worker at sea, a seafarer, a worker in the maritime industry, or a worker in a commercial fleet or merchant ship.

• Outcome was mental health, psychological or psychosocial issues.

• Articles determined the relationship between factors relevant to seafaring working conditions or working environment, and mental health or psychosocial issues.

• Study subject was in the navy with pre-postcombat/deployment and had worked on a royal navy ship.

• Study subject was a worker in the oil and gas industry or an offshore-onshore worker.

• Study subject experienced mental health illness or was under treatment for a mental health illness.