Table 4. Factors affecting adequate protection for N95 respirators.
| Characteristics | Fit factor | Leakage rate | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Univariate analysis | Multivariate analysis | Univariate analysis | Multivariate analysis | ||||||
| OR (95% CI) | P value | aOR (95% CI) | P value | OR (95% CI) | P value | aOR (95% CI) | P value | ||
| Sex | |||||||||
| Male | 1.26 (0.31–1.12) | 0.340 | 0.94 (0.49–1.79) | 0.842 | 0.84 (0.78–11.43) | 0.059 | |||
| Age, yr | 1.06 (0.99–1.14) | 0.081 | 1.02 (1.06–1.58) | 0.012 | 0.97 (0.91–1.04) | 0.378 | |||
| Facial width, mm | 1.01 (0.99–1.03) | 0.257 | 1.02 (1.00–1.04) | 0.051 | |||||
| Facial length, mm | 1.02 (1.00–1.05) | 0.033 | 1.02 (0.98–1.04) | 0.096 | |||||
| BMI, kg/m2 | |||||||||
| < 18.5 | Reference | 0.252 | Reference | 0.100 | |||||
| 18.5–23 | 3.20 (0.34–29.77) | 0.307 | 2.55 (0.27–23.72) | 0.412 | |||||
| 23–25 | 6.00 (0.58–61.84) | 0.132 | 7.11 (0.69–73.71) | 0.100 | |||||
| > 25 | 5.23 (0.52–52.56) | 0.160 | 2.32 (0.23–23.42) | 0.477 | |||||
| Occupation | |||||||||
| Doctor | 1.20 (0.35–1.34) | 0.501 | 5.34 (0.90–31.57) | 0.065 | 1.28 (0.65–2.53) | 0.471 | |||
| Department of working | |||||||||
| Othersa | Reference | 0.032 | Reference | 0.462 | |||||
| IM | 3.41 (1.33–8.79) | 0.011 | 1.42 (0.58–3.51) | 0.447 | |||||
| ICU | 3.07 (1.17–8.07) | 0.023 | 1.79 (0.71–4.52) | 0.216 | |||||
| Career, yr | 0.84 (0.95–1.09) | 0.551 | 0.86 (0.74–1.00) | 0.043 | 0.96 (0.90–1.03) | 0.295 | |||
| Education in respirator usage | |||||||||
| No | 0.75 (0.81–2.96) | 0.234 | 1.05 (0.55–2.00) | 0.894 | |||||
OR = odds ratio, aOR = adjusted odds ratio, CI = confidence interval, BMI = body mass index, IM = internal medicine, ICU = intensive care unit.
aHemodialysis room, outpatient clinics, infection control office.