Table.

HCWs’ Distribution and Working Conditions.

Clinic	Gender	Count	Mean Age ± CI	Dentist	Dental Assistant	Aspiration System	PPE Set	HEPA Filters
A	Female	43	42.74 ± 3.19	28	28	V6000 (dry mode)	Reinforced type II	H14
	Male	13	47.46 ± 9.22
B	Female	46	43.15 ± 2.77	30	30	V6000 (semidry mode)	Reinforced type II	H14
	Male	14	46.36 ± 7.3
C	Female	30	42.43 ± 3.2	20	21	VS900	Reinforced type II	None
	Male	11	43.73 ± 8.03
Total		157	43.58 ± 1.66	78	79

H14 HEPA (EN 1822-1:2019-10/ISO 45H/ISO 29463-1:2017).