Summaryobjective To evaluate rapid and simple laboratory investigations to predict fatal outcome in infants presenting with diarrhoea and severe malnutrition. results In logistic regression analyses, after adjusting for all available potential confounders (abnormal WBC count, higher CRP level, hyponatraemia, hypokalaemia, hypocalcaemia, and hypomagnesaemia), cases (n = 10) were significantly associated only with hypoglycaemia (measured using a portable bedside finger blood glucose test) (odds ratio 5.0, CI 1.1-23.0, P = 0.039) on admission.conclusion A simple rapid bedside glucose test may be used to predict the outcome of diarrhoeal infants presenting with severe malnutrition.