Skip to main content
letter
. 2020 Mar 20;125(1):e166–e168. doi: 10.1016/j.bja.2020.02.020

Table 1.

General characteristics and outcomes of patients. Data shown as mean (standard deviation), median [inter-quartile range], or n (%). Continuous data were compared using independent-sample t-test or Mann–Whitney U-test. Proportions were analysed using Fisher's exact test or χ2 test. HFNO, high-flow nasal oxygenation; SMO, standard mask oxygenation.

Characteristic Group HFNO Group SMO P-value
Patients, n 28 30
Sex, M/F 14/14 19/11
Age (yr) 64.3 (11.6) 67.1 (9.9)
Weight (kg) 66.9 (9.4) 70.3 (9.1)
Height (cm) 165.5 (8.7) 167.0 (7.8)
Ventilatory frequency 26.8 (5.9) 27.7 (5.3)
Co-morbidities, n (%)
 Hypertension 16 (57.1) 19 (63.3)
 Diabetes mellitus 3 (10.7) 2 (6.7)
 Cardiovascular disease 8 (28.6) 10 (33.3)
Primary and secondary outcomes
 Pao2/Fio2 before intubation 139.5 [118.3; 162.3] 128.5 [121.5; 136.3] 0.225
 Total time to intubation (s) 68.5 [62.2; 74.0] 76.0 [68.0; 90.5] 0.005
 Lowest Spo2 during intubation 94.0 [92.1; 95.8] 91.2 [86.3; 93.0] 0.001
 Mask ventilation for Spo2 <90%, n (%) 1 (3.6) 8 (26.7) 0.015
 Percentage of minimum Spo2 >95% during intubation, n (%) 8 (28.6) 3 (10) 0.071
 Percentage of Spo2 <80% during intubation, n (%) 0 (0) 2 (6.7) 0.164