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. 2021 Apr 5;16(4):e0249201. doi: 10.1371/journal.pone.0249201

Table 1. Participant and equipment characteristics for the filtering test.

Here are summarised the baseline characteristics of the participants, their professional roles and the types of masks used in the filtration experiment.

Participant characteristics Number (%)
Included in analysis 56
Previously passed FFP3 fit test 33 (59)
Average Age (years) 36.8
Male Sex 25 (45)
Sensitive to Denatonium 46 (82)
Sensitive to Saccharine 10 (18)
Participants wearing glasses 8 (14)
Participants with beard 3 (5)
Participant Role
 Doctor 19 (34)
 Radiographer 16 (29)
 Nurse 8 (14)
 Porter 3 (5)
 Healthcare assistant 3 (5)
 Sonographer 2 (4)
 Modality assistant 1 (2)
 Technologist 1 (2)
 Physiologist 1 (2)
 Medical student 1 (2)
 Nurse endoscopist 1 (2)
Equipment used for filtering test
Snorkel mask
 Mosfiata (elliptical connector) 39/56 (70)
 X99 (round connector) 17/56 (30)
FFP3 mask
 Foldable 3M 1873V mask 56/56 (100)

Abbreviations: FFP, Filtering face piece