Table 2 Range for total sample and explanations of variables used
Variable | Minimum | Maximum | Explanation |
|---|---|---|---|
Age_D | 1 | 31 | Age in days (~ = time on ventilator) |
APGAR_1 | 0 | 9 | APGAR Score at 1 minute |
APGAR5_1 | -2 | 7 | Difference between APGAR at 1 and 5 minutes |
BE | -7.5 | 6 | Base excess content in blood |
BP | 28.5 | 67 | Blood pressure |
CurrWeight | 808 | 1600 | Current weight |
dBE | -4.5 | 1.7 | Change in base excess since last measurement |
dBP | -13.7 | 27.0 | Change in blood pressure since last measurement |
dFIO2 | -30.0 | 21.8 | Change in FiO2 since last measurement |
dHCO3 | -3.0 | 4.0 | Change in HCO3 since last measurement |
dIErat | -3.5 | 2.8 | Change in I:E ratio since last measurement |
dINSP | 0.0 | 1.0 | Change in INSP since last measurement |
dMAP | -2.4 | 1.1 | Change in MAP since last measurement |
dPaCO2 | -6.4 | 22.0 | Change in PaCO2 since last measurement |
dPaO2 | -63.3 | 50.0 | Change in PaO2 since last measurement |
dPEEP | -3.0 | 1.3 | Change in PEEP since last measurement |
dPH | -0.2 | 0.1 | Change in pH since last measurement |
dPIP | -3.0 | 2.4 | Change in PIP since last measurement |
dPulse | -27.0 | 42.0 | Change in heart rate since last measurement |
dRATE | -15.0 | 10.6 | Change in ventilatory breathing rate since last m. |
dRRatio | -3.3 | 3.4 | Change in rate ratio (spont. vs. vent.) since last m. |
dSaO2 | -4.0 | 15.0 | Change in SaO2 since last measurement |
dTIME | 0.3 | 51.6 | Time between last two blood gases analyses |
dV T | -1.8 | 2.5 | Change in V T |
FiO2 | 20 | 60 | Oxygen content in air delivered by ventilator |
Gst_age | 25 | 35 | Gestational age |
HCO3 | 16 | 35 | Bicarbonate content in blood |
IEratio | 1 | 17.2 | I : E ratio (inspiratory to expiratory time) |
INSP | 0.23 | 0.5 | Inspiratory time |
Lag | 0.25 | 17.5 | Lag time between last blood gas result and extubation |
MAP | 4.2 | 10.9 | Mean airway pressure |
PaCO2 | 23 | 65 | Partial pressure of carbon dioxide in blood |
PaO2 | 23 | 228 | Partial pressure of oxygen in blood |
PEEP | 3 | 5 | Positive end-expiratory pressure |
pH | 7.24 | 7.58 | Acidity or alkalinity of blood |
PIP | 10 | 21 | Peak inspiratory pressure |
Pulse | 112 | 187 | Heart rate |
R_ratio | 0.4 | 6.0 | Ratio: spontaneous breathing rate/ventilatory rate |
Rate | 10 | 60 | Ventilatory breathing rate |
Saline | 0 | 26 | Saline bolus within 24 hours prior to extubation |
SaO2 | 79 | 100 | Oxygen saturation in blood |
Theoph | 0 | 8.3 | Theophilline bolus within 24 hours prior to extubation |
V T | 3 | 15.7 | Tidal volume |
TXBETAME | 0 | 1 | Maternal betamethasone |