Table 4.

Variables used in the analysis of crane accidents.

Variable	Categories	Reference
Material Agent	(11.03.00.00) Fixed, mobile, vehicle-mounted, overhead, overhead cranes, levelling equipment	ESAW Variable [37]
	(11.03.01.00) Cranes, bridge cranes	ESAW Variable [37]
	(11.03.01.019 Cranes	ESAW Variable [37]
	(11.03.01.02) Loading/unloading manipulator	ESAW Variable [37]
	(11.03.01.03) Overhead and gantry cranes	ESAW Variable [37]
	(11.03.01.04) Vehicle loading arm	ESAW Variable [37]
	(11.03.02.00) Winches, hoists, balancers	ESAW Variable [37]
	(11.03.02.01) Winches, hoists, lifting pulleys, mufflers, balancers	ESAW Variable [37]
	(11.03.99.00) Other overhead lifting equipment	ESAW Variable [37]
	(14.11.00.00) Loads—suspended from leveling device, a crane	ESAW Variable [37]
Severity of injury	(1)Minor	Fuentes-Bargues et al. [38]
	(2)Serious	Fuentes-Bargues et al. [38]
	(3)Fatal	Fuentes-Bargues et al. [38]
Length of service	(1)Up to 1 month	Camino-López et al. [39]
	(2)1–2 months	Camino-López et al. [39]
	(3)3–4 months	Camino-López et al. [39]
	(4)5–7 months	Camino-López et al. [39]
	(5)8–12 months	Camino-López et al. [39]
	(6)1–3 years	Camino-López et al. [39]
	(7)3–10 years	Camino-López et al. [39]
	(8)More than 10 years	Camino-López et al. [39]
Contracts or subcontracts	(1)Yes contractor/subcontractor	Salguero-Caparrós et al. [40]
	(2)No contractor/subcontractor	Salguero-Caparrós et al. [40]
Age of the injured worker	(1)Up to 24 years old	Fontaneda et al. [41]
	(2)25–34 years old	Fontaneda et al. [41]
	(3)35–44 years old	Fontaneda et al. [41]
	(4)45–54 years old	Fontaneda et al. [41]
	(5)55 years or older	Fontaneda et al. [41]
Company staff	(1)<5 employees	Fuentes-Bargues et al. [38]
	(2)6–10 employees	Fuentes-Bargues et al. [38]
	(3)11–25 employees	Fuentes-Bargues et al. [38]
	(4)26–50 employees	Fuentes-Bargues et al. [38]
	(5)51–100 employees	Fuentes-Bargues et al. [38]
	(6)101–250 employees	Fuentes-Bargues et al. [38]
	(7)>250 employees	Fuentes-Bargues et al. [38]