Table 3.

The descriptions of risk factors.

number	Risk factors	Literature support
$c_1$	Employee infection risk	(Akpieyi et al., 2015, Kumar et al., 2015)
$c_2$	Low employee safety awareness	(Manupati, et al., 2021)
$c_3$	Improper operation by employee	(Huang et al., 2020, Kumar et al., 2015, Manupati et al., 2021)
$c_4$	Inadequate personal protection of employee	(Huang et al., 2020, Ouyang et al., 2021)
$c_5$	Improper disinfection of transfer tools	(Akpieyi et al., 2015, Manupati et al., 2021)
$c_6$	Unsafe handling equipment	(Huang et al., 2020, Kumar et al., 2015)
$c_7$	Unreasonable collection and transportation of medical waste containers	(Ouyang, et al., 2021)
$c_8$	Irregular construction of temporary storage sites for medical waste	(Taslimi, et al., 2020)
$c_9$	Unreasonable location of storage location	(Kumar et al., 2015, Taslimi et al., 2020)
$c_{10}$	Failure to conduct regular health checkups on relevant personnel	(Akpieyi et al., 2015, Manupati et al., 2021)
$c_{11}$	Insufficient technical training	(Ouyang et al., 2021, Song et al., 2020)
$c_{12}$	Lack of safety education	(Huang et al., 2020, Makan and Fadili, 2020)
$c_{13}$	Insufficient accountability system	(Makan and Fadili, 2020, Song et al., 2020)
$c_{14}$	Insufficient emergency response mechanism for safety management	(Huang et al., 2020, Makan and Fadili, 2020)
$c_{15}$	Insufficient supervision of collection and disposal	(Makan and Fadili, 2020)
$c_{16}$	Harsh processing environment	(Huang, et al., 2020)