The Use of DAO as a Marker for Histamine Intolerance: Measurements and Determinants in a Large Random Population-Based Survey.

Factors Associated with DAO Levels When considering the median DAO, a significant trend of increasing DAO was seen with increasing BMI ( p = 0.004) and increasing age ( p <0.001), where the group >61 years were found to have a higher DAO than other age groups ( Figure 2 ).

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