BioMed Research International / 2017 / Article / Tab 2

Clinical Study

Endotracheal Intubation Using a Direct Laryngoscope and the Protective Performances of Respirators: A Randomized Trial

Table 2

Fit factor of N95 or a higher mask in the baseline scenario and intubation scenario ().

Types of N95 or a higher mask
Cup typeFold type Valve type valueCup type versus fold typeCup type versus valve type Fold type versus valve type

Baseline phaseFit factor200 (200-200)200 (200-200)200 (179–200)0.1070.0150.2250.009
Adequate protection (percent)100 (78.61–100)100 (100-100)100 (76.1–100)0.0810.0310.2660.104
Intubation phaseFit factor200 (102.75–200)200 (200-200)142.5 (63.5–200)<0.0010.0010.048<0.001
Adequate protection (percent)74.16 (36.1–98.91)100 (91.61–100)62.5 (8.13–100)0.011<0.0010.118<0.001
Intubation time Intubation time (seconds)33.24 (2.58)28.69 (1.55)29.88 (1.63)0.2470.3240.701.00
Intubation success rateIntubation success rate (percent)24 (100)24 (100)24 (100)
PreferencePreference2 (8.3)10 (41.7)12 (50.0)

Categorical variables are given as numbers (percentage). Continuous variables with a normal distribution are given as mean (SD). The nonparametric variables are given as median (IQR). Cup type: 3M 1860. Fold type: 3M 1870. Valve type: 3M 9332. Success rate is the percentage of fit factor greater than or equal to 100. Intubation time is the time from inserting the blade into the mouth to the first ventilation.