Table 1.

Number of cases, seafarer-years, incidence rates and incidence rate ratios (IRR) of injury and disease by rank and worksite of seafarers from 2016 to 2019

Variable	Injury (n=78)	Seafarer-years	Injury incidence rate (95% CI)	IRR* (95% CI)	P value
Total	78	12 365	6.31 (4.98 to 7.86)	N/A
Rank
Officer	19	4451	4.27 (2.57 to 6.66)	1
Non-officer	59	7914	7.45 (5.68 to 9.61)	1.75 (1.02 to 3.10)	0.029
Worksite
Deck	43	4946	8.69 (6.29 to 11.69)	1.99 (1.21 to 3.34)	0.004
Engine	28	6430	4.35 (2.89 to 6.29)	1
Galley	7	989	7.07 (2.85 to 14.53)
	Disease (n=301)	Seafarer-years	Disease incidence rate (95% CI)	IRR* (95% CI)
Total	301	12 000	25.00 (22.36 to 28.04)	N/A
Rank
Officer	84	4320	19.44 (15.54 to 24.02)	1
Non-officer	217	7680	28.25 (24.66 to 32.21)	1.45 (1.12 to 1.89)	0.003
Worksite
Deck	171	4800	35.63 (30.56 to 41.26)	2.12 (1.65 to 2.72)	0.001
Engine	105	6240	16.83 (13.78 to 20.33)	1
Galley	25	960	26.00 (16.92 to 38.20)

*IRR only reported the result with a significant comparison at p<0.05 for non-officer versus officer, deck versus engine, deck versus galley and engine versus galley.

N/A, not applicable.