Malnutrition trends in displaced Rohingya children from 2017 to 2024: a comprehensive 7-year repeated cross-sectional analysis

OBJECTIVES: To assess population-level trends in malnutrition among Rohingya refugee children in Cox's Bazar, Bangladesh, from 2017 to 2024, and examine associations with age, sex, seasonality and food assistance purchasing power. DESIGN: A retrospective repeated cross-sectional study analysing anthropometric and economic data from 2017 to 2024. SETTING: Two primary health clinics in the Kutupalong and Balukhali refugee camps in Cox's Bazar, home to over one million Rohingya refugees including over 440 000 children facing ongoing food insecurity and limited healthcare access. PARTICIPANTS: 13 219 refugee children aged 6-60 months with recorded weight-for-height z-scores (WFZ) and mid-upper arm circumference (MUAC) data in electronic health records. The majority (>80%) of the data were from routine, non-illness-related visits. MAIN OUTCOME MEASURES: Prevalence and severity of global acute malnutrition (GAM), measured by first-visit WFZ and MUAC. Secondary outcomes included seasonal variation, sex and age disparities and trends in e-voucher purchasing power. RESULTS: From 2017 to 2024, population-level trends in GAM prevalence significantly increased, peaking at 38.4% in 2021. Male children showed poorer nutritional outcomes (mean WFZ: -0.96 vs -0.89 for females; p=0.005), and malnutrition severity rose with age (p