Gong et al evaluated factors associated with mortality in an elderly patient with acute kidney injury (AKI). This can help to identify a patient who may benefit from more aggressive management. The authors are from Fudan University and Jiangsu University in Shanghai, China.
Patient selection: age >= 65 years, presence of acute kidney injury
Parameters:
(1) sex
(2) age in years
(3) concomitant disease
(4) multi-organ dysfunction
(5) pre-albumin in mg/L
(6) sepsis or serious infection
(7) serum creatinine in µmol/L
Parameter
Finding
Beta-Coefficient
sex
male
0
female
0.224
age
-0.034 * (age)
concomitant disease
yes
0
no
-1.953
MODS
no
-1.962
yes
0
pre-albumin
normal or elevated
-1.113
reduced
0
sepsis or serious infection
no
0
yes
0.004
serum creatinine
0.001 * (creatinine)
where:
• The point assignment for variables is not clearly defined in the text. There was no supplemental file describing the model in detail.
• Sepsis/infection variable may be using the SOFA score.
• Prealbumin handling as written (values over 100 times -1.113) gives absurd values.
value of X =
= SUM(beta-coefficients) + 3.848
probability of morality =
= 1 / (1 + EXP((-1) * X))
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