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. 2021 Apr 15;19(1):805–817. doi: 10.1007/s40201-021-00648-3

Table 3.

Comparison of the QNFT results of the studied respirators by respirator style

Respirator style Numbers of studied respirators
(%)
Mean ± SD
for FFs
95% CI for Mean
of FFs
Overall
p
Lower Upper
Cup 6 (30) 47.66 ± 54.85 41.27 55.50 <0.001
Flat-fold 14 (70) 30.13 ± 67.99 24.38 36.04

SD Standard Deviation

FF Fit Factor

CI Confidence Interval