Impact of Nutritional Support for Tuberculosis on Intermediate and Terminal Undernutrition and Treatment Outcomes (INSTITUT) study: a protocol for a quasi-experimental study to assess the impact of nutritional support on tuberculosis treatment outcomes in Benin and Togo.

Introduction: Undernourished persons with tuberculosis (TB) (PWTB) are at increased risk of mortality, treatment failure and relapse. Nutritional support for PWTB has the potential to mitigate the risk of undernutrition. However, given ethical concerns, well-powered randomised control trials of macronutrient support are unavailable to inform policymakers, clinicians and researchers about the impact of nutritional support.