TABLE 1

Baseline Characteristics of Patients

HelmetMaskP
n1713
Age, mo9.2 (8 to 12)8.2 (8 to 9).66
Male gender8 (47)6 (46).49
Weight, kg8.3 (7 to 10)7.4 (5 to 8).35
PIM24.0 (3 to 4.5)5.0 (3 to 7).26
Causes of respiratory failure
 RSV-bronchiolitis12 (70)9 (70).57
 RSV-bronchiolitis and coinfection5 (30)4 (30).89
Comorbidities
 Pulmonary bronchodysplasia2 (11.7)2 (15).89
 Congenital heart disease2 (11.7)1 (7.6).96
 Epilepsy2 (11.7)2 (15).78
 Neuromuscular disease1 (5.8)0.92
 Previous admission for RSV3 (17.6)3 (23).88
RR, breaths per minute60 (50 to 70)60 (35 to 75).98
Fio20.4 (0.4 to 0.5)0.4 (0.4 to 0.5).65
CPAP, kPa0.49 (0.49–0.68)0.49 (0.49 to 0.58).74
Pao2:Fio2177 (151 to 206)163 (153 to 190).80
PaCO2, kPa5.5 (4.5 to 6.3)5 (3.7 to 5.8).51
Arterial pH7.38 (7.3 to 7.4)7.37 (7.31 to 7.39).75
Base excess, mEq/L0 (−1.5 to 1.2).15 (−0.9 to 1.2).44
Serum bicarbonate, mEq/L26 (24 to 27)24 (24 to 30).11
HR, beats per minute154 (144 to 169)135 (122 to 145).06
Systolic blood pressure, kPa14.6 (12.9 to 15.9)13.3 (11.9 to 15.9).51
Lactate serum, mmol/L1.2 (1.05 to 1.35)0.9 (0.75 to 1.05).48
Body temperature, °C37.1 (36.6 to 37.6)36.9 (36.5 to 37.6).93
  • Data are expressed as n (%) or median (interquartile range).