Table 2.
The top 18 variables selected on each day after employing predictive mean matching imputation with regard to in-hospital mortality. I at the beginning of the variables names means indicator. Numbers represent the ranking after aggregating the ranking results from the 3 different feature selection methods.
| Day 1 | Day 2 | Day 3 | |||
| Variable | Score | Variable | Score | Variable | Score |
| BUNa | .825715 | BUN | 1 | RDWb | .75246 |
| AGc | .668918 | RDW | .711852 | BUN | .635729 |
| RDW | .573188 | HCO3d | .684191 | BEe | .633926 |
| HCO3 | .531746 | AG | .664339 | HCO3 | .62367 |
| MCHCf | .507343 | BE | .528778 | I-BE | .595553 |
| PCO2g | .489483 | MCHC | .503805 | I-PCO2 | .595238 |
| Crh | .480181 | PTi | .453111 | I-PO2j | .594924 |
| BE | .452599 | Clk | .429405 | pH | .556242 |
| I-Lacl | .436382 | I-Lac | .425279 | Phosm | .494694 |
| Lac | .415773 | Cr | .395266 | AG | .492864 |
| HGBn | .414263 | I-PO2 | .382404 | I-pH | .470007 |
| pH | .402466 | I-PCO2 | .381737 | I-Lac | .469215 |
| I-TBilo | .399363 | I-BE | .381448 | Cr | .415249 |
| I-Ca | .395278 | PTTp | .357339 | Lac | .396136 |
| I-ALTq | .376004 | Phos | .352738 | NEr | .338372 |
| I-ASTs | .375944 | Nat | .345109 | PT | .326491 |
| LYu | .375163 | I-PT | .333936 | LY | .319146 |
| I-ALKv | .366346 | BGw | .320947 | MCVx | .314868 |
aBUN: blood urea nitrogen.
bRDW: red cell distribution width.
cAG: anion gap.
dHCO3: bicarbonate.
eBE: base excess.
fMCHC: mean corpuscular hemoglobin concentration.
gPCO2: partial pressure of carbon dioxide.
hCr: creatinine.
iPT: prothrombin time.
jPO2: partial pressure of oxygen.
kCl: chloride.
lLac: lactate.
mPhos: phosphate.
nHGB: hemoglobin.
oTBil: total bilirubin.
pPTT: partial prothrombin time.
qALT: alanine transaminase.
rNE: absolute neutrophils.
sAST: aspartate transaminase
tNa: sodium
uLY: absolute lymphocytes.
vALK: alkaline phosphatase.
wBG: blood glucose.
xMCV: mean corpuscular volume.