Result of comparing CPC with SMPS.

<p>The solid lines indicate the mean percent difference; the dashed lines indicate ±1.96 standardized deviations (SD) around the mean percent difference; the vertical dashed line represents the CPC's dynamic upper limit; the horizontal dashed line represents a percent difference of 0.</p

Particle number size distributions of the NaCl aerosol particles measured by SMPS.

<p>The vertical solid line indicate a particle diameter of 100 nm.</p

Comparison of two Condensation Particle Counters (CPCs) below and above their dynamic upper limits (100,000 #/cc).

<p>The solid lines indicate mean percent difference; the dot-dashed lines indicate ±1.96 standardized deviations (SD) around the mean percent difference; the vertical dashed line represents the CPC's dynamic upper limit; the horizontal dashed line in A represents the CPC's dynamic upper limit; the horizontal dashed line in B represents a percent difference of 0.</p

Mean count and proportion of particle size ranges of 300 to 500 nm and 500 to 1000 nm according to OPC measurements.

<p>Mean count and proportion of particle size ranges of 300 to 500 nm and 500 to 1000 nm according to OPC measurements.</p

Comparison of 500 to 1000 nm particle measurements by two Optical Particle Counters (OPCs).

<p>The solid lines indicate mean percent difference; the dot-dashed lines indicate ±1.96 standardized deviations (SD) around the mean percent difference.</p

Comparison of 300 to 500 nm particle measurements by two Optical Particle Counters (OPCs).

<p>The solid lines indicate mean percent difference; the dot-dashed lines indicate ±1.96 standardized deviations (SD) around the mean percent difference.</p

Inward Leakage (IL) and filter penetration for 10 models of FFRs in this study.

<p>Abbreviation: IL, Inward leakage; FFR, Filtering facepiece respirator; GSD, geometric standard deviation, SD, standard deviation.</p

The mean and standard deviation for all 25 anthropometric dimensions based on gender and all participants.

<p>The mean and standard deviation for all 25 anthropometric dimensions based on gender and all participants.</p

The geometric mean FFs^* and their geometric standard deviation for 10 models of FFRs for cells in Chinese respirator fit test panels.

<p>Abbreviation : FF, fit factor; FFR, Filtering facepiece respirator.</p>*<p>value expressed as geometric mean (geometric deviation).</p

Leakage for 10 models of FFR detected by fit test and self-feeling of participants.

<p>Abbreviation : FFR, Filtering facepiece respirator.</p>*<p>Pass was defined as at least two of the three FFs are greater than 100 for fit test and no leakage for self-feeling.</p