The phrase "a reference category of" is correct and usable in written English.
It is typically used in statistical or research contexts to denote a baseline or comparison group against which other categories are measured.
Example: "In this study, we will analyze the effects of the new treatment, using the control group as a reference category of comparison."
Alternatives: "a baseline category of" or "a comparison category of".
This makes transnational characteristics collinear because they each contain a reference category of children living without a migration experience.
Using a reference category of women without depressive symptoms who had initiated ART, the hazard ratio for women with depressive symptoms who had initiated ART was 3.60 (95% CI: 2.02, 6.43).
"Daughters-in-law" was used as a reference category of kin relationships.
A reference category of groups derived from purely observational studies without any prevention method under study provided a benchmark incidence.
13 In the second model, the independent variable was findings on coronary computed tomographic angiography (that is, non-obstructive, obstructive, and extensive obstructive with a reference category of normal coronary arteries).
We analyzed the time-dependent variable for duration of tobacco smoking (20 40 years or ≥ 40 years), relative to a reference category of subjects who had not smoked or smoked < 20 years, in the men's model.
Cured TB status was used as a reference category instead of the present rendition.
That is, as a proportion of the value obtained for a reference category (Rate ratio of lowest versus highest group).
Calves (< 12 months) were used as a reference category N number of animals infected There was a significant association between sex of cattle and trypanosome infections (χ 2 = 16.64, df = 1, P < 0.001).
a Reference category is no history of hypertension.
a reference category, b Estimated effect of being an adolescent on social and economic support derived from logistic regression This study showed that 71% of the pregnant women initiated ANC attendance after the recommended four months of pregnancy, at an average of 5.1 months (Table 2).
