| Summary: | The proportion of elderly population is growing faster than any other age group. Malnutrition is a widespread problem in the elderly and has been recognized as the most common cause of mortality and morbidity. Some guidelines recommend using the Mini Nutritional Assessment (MNA) to detect risk of malnutrition among elderly subjects aged> 70 years. MNA assessment was based on a questionnaire, do not use biological indicators are more appropriate for geriatric who stay at home or in a nursing home than during hospitalization, because the natural bias questionnaire. For patients who were hospitalized recommended nutritional risk index (NRI) that using data of albumin and usual weight data before the illness. However, the usual weight data is often not possible to obtain in elderly patients. Thus prepared formula Geriatric Nutritional Risk Index (GNRI) using ideal body weight. This study uses a prospective cohort design in geriatric patients who were treated at the hospital admitted in January-February 2012. In patients with anthropometric and laboratory examination no later than 48 hours after admission and calculated GNRI. GNRI divided into 2 groups: GNRI <82 and GNRI � 82. Patients followed up until go home or die. Then next calculated patients length of stay. The results showed similar baseline characteristics of patients in age, gender and depression. Charlson index of comorbidity and Hb group differ significantly among the two groups, but non-significant after correlated using Spearman correlation. Length of stay and mortality rates differ significantly among the two groups with p <0.05. GNRI negatively correlated with length of stay with r= 0.352, p = 0.006. The highest mortality in the group GNRI <82 and after multivariate analysis with other variables found 2 things that affect the mortality: GNRI <82 with a relative risk of 15.18 and Charlson index comorbidity with RR = 12. Conclusion : Geriatric Nutritional Risk Index has moderate negative correlation (r= 0,352) with length of stay in elderly patients admitted to hospital. Geriatric Nutritional Risk Index score <82 increased 15.18-fold relative risk for mortality and Charlson comorbidity index >3 increased 12-fold relative risk for mortality in elderly patients admitted to Sardjito Hospital.
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