<qa>  What is the SIG value in American studies described?In addition it was found that there is a significant difference in the threshold for SIG value associated with higher mortality. The abnormal SIG value in American studies are described around 5 mEql . However studies from Europe and Australia reported higher values in the range of 8-13 mEql. It is speculated that this difference is due to exogenous sources of unmeasured ions from gelatin based intravenous fluids used for resuscitation. Interestingly studies using gelatine- based fluids also failed to show a correlation between SIG and mortality. SIG values have not been published in critically ill Asian adult patients admitted to the Intensive Care Units ICU as yet. We aim to find the SIG for these patients in the hope that it will be useful for predicting outcome. Our hypothesis is that SIG is an independent predictor of outcomes in adult patient with shock. 