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Discover LudwigThe phrase "as reference category" is correct and usable in written English.
It is typically used in statistical analysis or research contexts to indicate a baseline or comparison group against which other categories are measured.
Example: "In this study, we used the control group as reference category to evaluate the effects of the treatment."
Alternatives: "as baseline category" or "as comparison group".
Exact(60)
The OR is referred to the high tertile compared to the low tertile as reference category.
Lowest quartile used as reference category (≤0.6%).
The share of low-educated workers serves as reference category.
Stable non-sufferers were used as reference category.
We also include 10 country dummy variables with France as reference category.
The share of young low-educated workers has been used as reference category.
In the absence of wild-type infections as reference category, these two groups were compared.
as reference category.
Male as reference category.
ref: served as reference category.
Not applicable as reference category.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com