Table 4.

Incidence rate ratios (IRR) and 95% CI of diseases and occupational injuries stratified by seafarers’ worksite from 2016 to 2019 (n=379)

Medical events	Deck versus engine			Deck versus galley			Engine versus galley
	IRR	95% CI	P value	IRR	95% CI	P value	IRR	95% CI	P value
Disease types
Gastrointestinal	1.86	1.06 to 3.33	0.021*	1.09	0.45 to 3.21	0.869	0.59	0.23 to 1.77	0.263
Musculoskeletal	2.14	1.13 to 4.17	0.013*	1.12	0.43 to 3.72	0.857	0.52	0.19 to 1.81	0.224
Cardiovascular	3.26	1.51 to 7.58	0.001*	1.25	0.43 to 4.94	0.721	0.39	0.11 to 1.68	0.135
Non-specific	1.80	0.83 to 3.99	0.108	3.59	0.57 to 149	0.182	1.99	0.30 to 84.9	0.561
Respiratory	2.62	1.11 to 6.57	0.017*	3.59	0.56 to 149	0.182	1.38	0.19 to 60.7	0.846
Dermatological	4.35	1.68 to 13.18	0.001*	1.00	0.34 to 4.03	1.044	0.23	0.05 to 1.11	0.053
Genitourinary	1.59	0.59 to 4.34	0.311	2.20	0.31 to 94	0.494	1.38	0.19 to 60.68	0.846
Eye/adnexa	1.14	0.35 to 3.59	0.803	1.40	0.18 to 63	0.837	1.23	0.17 to 55	0.933
Infectious and parasitic†	1.63	0.35 to 8.19	0.486	—	—	N/A	—	—	N/A
Ear/mastoid	0.32	0.006 to 3.28	0.337	0.20	0.002 to 15.6	0.333	0.61	0.06 to 30.30	0.646
Neurological	2.60	0.14 to 153	0.485	0.40	0.02 to 23.5	0.495	0.15	0.001 to 12	0.267
Mental/behavioral†	3.90	0.31 to 204	0.257	—	—	N/A	—	—	N/A
Injury Location
Wrist/hand	3.25	1.19 to 10.23	0.012*	1.00	0.28 to 5.39	1.050	0.31	0.06 to 1.90	0.130
Knee/lower leg†	1.86	0.64 to 5.75	0.216	—	—	N/A	—	—	N/A
Head/eye	3.90	0.69 to 39.50	0.089	1.20	0.15 to 55	0.949	0.31	0.02 to 18	0.398
Lower back/lumbar spine	1.73	0.29 to 11.80	0.494	0.80	0.08 to 39.7	0.794	0.46	0.04 to 24	0.524
Thorax/neck†	0.98	0.14 to 5.76	0.987	—	—	N/A	—	—	N/A
Skin burns	0.33	0.01 to 3.28	0.337	0.20	0.003 to 15.7	0.333	0.62	0.06 to 30.30	0.646
Upper arm/shoulder†	0.65	0.01 to 12.50	0.778	—	—	N/A	—	—	N/A
Elbow/forearm†	—	—	N/A	0.60	0.05 to 31.5	0.649	—	—	N/A

*Significant at p<0.05.

†Dashes indicate the comparison that was not performed.

N/A, not applicable.