Evaluation of nutritional status, food intake and food waste costs in hospitalized patients, considering relevant causes and finding possible solutions: Protocol of a mixed-method study (Preprint)
BACKGROUND Hospitalization may seriously affect patients’ nutritional status and may occasionally be accompanied by malnutrition development or aggravation. Food intake is often altered during hospitalization, which is tightly connected to malnutrition. On the other hand, a huge amount of plate food wasted by patients, in addition to its health consequences, has enormous economic and environmental expenses for governments and societies. OBJECTIVE This investigation aims firstly to assess the nutritional status of the patients hospitalized in general wards and secondly to evaluate the quantity and financial burden of patients’ food waste along with its possible nutritional outcomes. METHODS A mixed-method study is performed in three general hospitals in Tehran. Adult inpatients with eligibility criteria are recruited to the study from medical and surgical wards. Anthropometric and demographic data are collected and energy and protein intakes are extracted from a 24-hour food recall. Plate food wastes of eligible patients are weighed in breakfast, lunch, and snacks during one day. Then, the economic cost of food waste is calculated for each meal, patient, and ward. Nutritional status is determined through the following methods: 1. Subjective criteria (Mini Nutritional Assessment and Subjective Global Assessment tools) for malnutrition; 2. Measuring serum albumin, pre-albumin and total protein for protein status; 3. Measuring serum retinol and 25-hydroxycalciferol assay to assess certain micronutrient status (vitamins A and D); and 4. Examination of serum β-carotene, total antioxidant capacity, malondialdehyde, and highly sensitive C-reactive protein to determine oxidative stress and inflammatory status. Also, a qualitative study is conducted to evaluate the possible reasons for wasting food in these hospitals. RESULTS ----- CONCLUSIONS This study will provide appropriate data regarding the health and economic burden of food waste in studied hospitals. These data are especially useful to healthcare authorities and policymakers for planning efficient solutions to decrease food waste and to improve patients' nutritional status.