Prerequisites for establishing general recommendations for diagnosis and treatment of vitamin B₁₂ deficiency and cost‐utility evaluation of these guidelines

Abstract

There is currently no consensus on how to define, diagnose and treat vitamin B₁₂ deficiency. This is partly due to insufficient and non‐uniform study design. It is essential to come to a harmonization of rational study designs. In order to evaluate new tests for the diagnosis of vitamin B₁₂ deficiency, it is important that independent and unequivocal criteria for a clear‐cut definition of the disease are used. Furthermore, it is crucial to have a mutual understanding on the progression of the disease, how fast the different symptoms may develop and on the expected time frame of treatment and evaluation of response. The kind and intensity of treatment must also be agreed upon. The present article overviews the potential strategies of how to define and diagnose vitamin B₁₂ deficiency and on follow‐up of treatment response. Finally, based on these considerations, the prerequisites of a cost‐utility analysis of guidelines for diagnosing vitamin B₁₂ deficiency are discussed.

• B12‐supplementation
• cobalamin
• cost‐benefit analysis
• diagnosis
• diagnostic guidelines
• homocysteine
• methylmalonic acid
• vitamin B12 deficiency