The prevalence of malnutrition on admission to hospital varies between 15-60%. Knowing the extent of the problem and identifying at-risk patients should be a priority task since malnutrition is associated with increased hospital-related complications; longer length of stay, increased costs related to treatment and higher mortality. Post discharge, malnourished patients have also been linked to more frequent re-admissions, higher morbidity and mortality. Various screening tools are available, including the Nutrition Risk Screening-2002 recommended by European Society for Clinical Nutrition and Metabolism as the preferred screening tool for malnutrition in hospitals in Europe. ASPEN recommends a more comprehensive evaluation and diagnosis procedure. In South Africa, and the rest of Africa, nutritional screening is not routinely done and the investigators do not have any reliable national statistics indicating the extent of the problem. The aim of this study is to determine the prevalence of malnutrition on admission to hospital and to identify the impact thereof on relevant outcomes. Two different internationally recognised tools will be used and validated for the African context. In this multi-country, multi-centre descriptive cross-sectional study 3 hospitals in South Africa, 1 in Ghana and 2 in Kenya will be included. Adult patients (n=400 per hospital) will be screened on admission and at discharge and relevant outcomes (in-hospital and 3-month post-discharge) will be charted. A 50% sub-sample will be used to validate the 2 instruments.