Table II.
Fit factor after one and two decontamination cycles
| Respirator | Fit factor |
||||
|---|---|---|---|---|---|
| Baseline |
After one cycle |
After two cycles |
|||
| Median (Q1–Q3) | Median (Q1–Q3) | One cycle vs baseline P-value |
Median (Q1–Q3) | Two cycles vs baseline P-value |
|
| Bimedica Naturcare® FFP2 Conical with valve (128944) | 1.37 (1.33–1.38) | 13.64 (12.34–13.64) | 0.002a | 2.41 (2.32–2.72) | 0.002a |
| Dräger X-plore® 1730 V FFP3 | 161.79 (146.58–176.87) | 107.52 (102.64–147.05) | 0.063 | 553.68 (511.16–558.63) | 0.002a |
| Dräger X-Plore® 1920V FFP2 | 200.00 (200.00–200.00) | 200.00 (200.00–200.00) | 0.317 | 200.00 (200.00–200.00) | 0.317 |
| Dräger X-plore® 1930V FFP3 | 102.94 (97.59–110.85) | 141.67 (136.22–148.11) | 0.003a | 221.85 (221.85–251.26) | 0.002a |
| Dromex® 3231 FFP3 NR D | 34.97 (31.04–42.99) | 33.89 (29.86–39.28) | 0.406 | 71.39 (63.99–80.68) | 0.003a |
| Garry Galaxy N95 Respirator Mask | 4.70 (4.45–4.98) | 4.46 (4.34–4.62) | 0.253 | 6.36 (6.01–6.48) | 0.007a |
| HY 9330 FFP3 NR | 902.44 (846.04–1747.87) | 892.92 (892.92–1190.56) | 0.847 | 885.60 (844.12–942.55) | 0.565 |
| Oxyline X310SV FFP3 NR D | 214.00 (202.11–269.77) | 55.02 (54.37–64.51) | 0.002b | 88.06 (82.91–95.29) | 0.002b |
| Pioneer® Safety EP005 FFP2 | 17.42 (16.67–20.12) | 17.58 (15.83–20.14) | 0.848 | 14.80 (13.88–18.63) | 0.140 |
| PURVIGOR KN95 3D | 7.32 (7.15–7.80) | 6.69 (6.42–7.45) | 0.110 | 9.60 (9.20–10.42) | 0.003a |
| VENUS V-420-V | 23.19 (22.22–25.40) | 21.32 (20.92–22.37) | 0.110 | 10.08 (9.81–10.98) | 0.002b |
| 3MTM AuraTM 9320+ FFP2 NR D | 474.00 (454.25–546.92) | 333.80 (278.17–388.35) | 0.003b | 307.63 (277.29–358.13) | 0.013b |
| 3MTM VFlexTM 1802S | 104.30 (99.04–116.13) | 100.44 (76.53–113.44) | 0.565 | 82.54 (61.65–94.89) | 0.009b |
| 3MTM 8822 FFP2 NR D | 200.00 (200.00–200.00) | 115.33 (102.12–133.87) | 0.001b | 85.00 (80.28–86.85) | 0.001b |
Q1, Quartile 1; Q3, Quartile 3.
aIncrease in fit factor with a P-value <0.05.
bDecrease in fit factor with a P-value <0.05.
For calculating median, Q1, Q3 and P-values, seven consecutive fit factor measurements were taken for 1 min at regular 10-s intervals in each phase of the research (baseline, after one decontamination cycle and after two decontamination cycles).
Three units of each respirator model were used, one for each phase of the research.