Table 2.

Binary logistic regression for the association between adequate PPE availability and region of practice.^a

Region of practice (n = 441) (adequate PPE/no adequate PPE)	Model 1b (OR [95% CI])	Model 2c (OR [95% CI])
	Adequate PPE	Adequate PPE
Europe (52/61)	Reference	Reference
Africa (5/19)	0.31 [0.11-0.88]	0.45 [0.14-1.44]
Asia (57/67)	1.00 [0.60-1.66]	1.18 [0.66-2.12]
Australia (3/2)	1.76 [0.28-10.9]	1.53 [0.23-10.1]
Middle East (15/11)	1.60 [0.68-3.79]	2.61 [0.97-7.00]
North America (23/24)	1.12 [0.57-2.22]	0.98 [0.48-1.99]
South America (34/68)	0.59 [0.34-1.02]	0.63 [0.33-1.18]

Abbreviations: CMF, craniomaxillofacial; COVID-19, COrona VIrus Disease-19; HCW: health-care worker; OR: odds ratio; PPE, personal protective equipment.

^a Significant associations are bold.

^b Unadjusted model.

^c Additionally adjusted for previous virus outbreaks, which guidelines are used, which type of maximal mask protection is available for HCWs.