[Multiple organ dysfunction scoring system: comparison and evaluation of correlation and accuracy of the three scoring systems in predicting the outcome of multiple organ dysfunction syndrome on highland].
OBJECTIVE
To study the characteristics of the diagnostic parameters of acute respiratory distress syndrome/multiple organ dysfunction syndrome on plateau (H-ARDS/MODS) and compare the accuracy of the three MODS scoring criteria in predicting the outcome of syndrome.


METHODS
Five hundred and forty cases fulfilling the criteria of MODS were divided into four groups according to the altitude of their inhabitation area: control group (on plain, CG, n=113, altitude: <430 m), moderate high altitude group 1 (H1G, n=314, altitude: 1,517 m), moderate high altitude group 2 (H2G, n=78, altitude: 2,261 m to 2,400 m) and high altitude group (HG, n=35, altitude: 2 808 m to 3 400 m). According to the diagnostic criteria of Lushan conference and Marshall (1995) commonly used on plain, and Lanzhou criteria drafted by the authors, three data analyzing models were set up to draw the receiver operating characteristic (ROC) curves, the Yordon Index and the optimum cutoff points of the parameters were calculated and the accuracy of the three respective diagnostic criteria was evaluated in predicting the outcome of ARDS/MODS. Multiple factors affecting the outcome of MODS were analyzed using the method of stepwise forward regress model.


RESULTS
Following the increase in altitude, Lanzhou criteria was clearly superior to the other two criteria in the area of ROC, the sensitivity, the specificity, and also for the optimum cutoff points of MODS. Multi-variable regression analysis showed that the impacting factor of Lanzhou criteria was the highest (P<0.05).


CONCLUSIONS
(1)Some parameters of the current diagnostic criteria of ARDS/MODS are not suitable in moderately high or high altitude areas. It is necessary to set up the diagnostic criteria of H-ARDS/MODS. (2)Some clinical characteristics might change in areas 1,500 m altitude or higher. The pathophysiological mechanism might be attributable to peculiar biologic reactions due to hypoxia stress reaction, and it is worth further study.
Zhang
Shi-fan
SF
Lanzhou General Hospital of Lanzhou Command, Lanzhou 730050, Gansu, China.
Zhang
De-hai
DH
Gao
Wei
W
Liu
Hui-ping
HP
Luo
Xiao-hong
XH
Da
Ga
G
Wu
Jian-ying
JY
Lin
Shu-xin
SX
Li
Nai-bin
NB
Chen
Tian-duo
TD
Wu
Tian-yi
TY
D000531:Altitude; D006801:Humans; D009102:Multiple Organ Failure / Q000175:diagnosis*; D011379:Prognosis; D012372:ROC Curve; D012044:Regression Analysis; D012128:Respiratory Distress Syndrome / Q000175:diagnosis*; D012720:Severity of Illness Index