Table 1.
Baseline patient characteristics
| Parameters | Helmet mask*(N = 30) | Face mask*(N = 30) | p value† |
|---|---|---|---|
| Gender, male | 18 | 15 | 0.43 |
| Age (years) | 53.23 ± 9.179 | 52.56 ± 9.807 | 0.787 |
| BMI (median IQR£) | 24.5 (22-27) | 23.5 (21-26) | 1.000 |
| Heart rate | 87.03 ± 3.567 | 87.87 ± 3.371 | 0.124 |
| Mean arterial blood pressure | 83.63 ± 1.159 | 83.33 ± 1.709 | 0.429 |
| PAO2/FIO2‡ | 155.33 ± 3.836 | 155.33 ± 2.975 | 0.946 |
| Respiratory rate | 32.77 ± 1.165 | 32.37 ± 1.066 | 0.171 |
| SpO2§ | 84.47 ± 1.479 | 84.6 ± 1.221 | 0.355 |
| SAPS II¥ | 32 ± 9 | 31 ± 9 | 0.668 |
| Comorbidities, n (%) | |||
| Diabetes | 10 (33.3) | 12 (40) | 0.592 |
| Hypertension | 12 (40) | 14 (46) | 0.602 |
| Coronary artery disease | 3 (10) | 5 (16.6) | 0.451 |
| Chronic kidney disease | 2 (6.6) | 3 (10) | 0.642 |
| Chronic liver disease | 1 (3.3) | 0 | 0.493 |
*
Values are presented as mean ± SD.
†
p value less than 0.05 is considered significant.
‡
PaO2/FiO2, ratio of partial pressure of oxygen and fraction of inspiratory oxygen concentration;
§
SpO2, saturation of oxygen;
£
IQR, interquartile range;
¥
Simplified Acute Physiology Score (SAPS) II calculator scores ranges from 0 to 163, with higher scores reflecting greater disease severity