The phrase "ascertaining categories" is correct and usable in written English.
It can be used when discussing the process of identifying or determining different classifications or groups within a certain context.
Example: "The research team focused on ascertaining categories of consumer behavior to better understand market trends."
Alternatives: "determining classifications" or "identifying groups".
The authors could not calculate relative risks because the exact BMI of control individuals was not known; rather, BMI data was ascertained in categories of exposure (Dieckmann et al, 2009).
In the third model in addition to the demographic and pharmacological variables, we estimate the model using 11 age categories, to ascertain the impact of age categories on cost.
The frequency of intake of 17 food items and several drinks were ascertained in five categories: never (0); less than once a week (1); at least once a week (2); on average, once a day (3); more than once a day (4).
Health status was ascertained using BMI categories (normal: BMI <25 kg/m, overweight: 25 ≤ BMI < 30 kg/m, obese: BMI ≥30 kg/m).
Estimates were ascertained for prespecified categories of MGI+ HOXB13 IL17BR, BCI, tumor size, and tumor grade for subgroups of ER-positive patients stratified on tamoxifen treatment.
To decide whether an individual's liberty ought to be protected, we must ascertain to which category the potential restriction of liberty belongs: offense, moralism, paternalism, and harm prevention.
These results support the hypothesis that the greater activation of posterior brain regions (including the left fusiform gyrus and the right middle temporal gyrus) while recalling famous persons vs. real entities might reflect the larger amount of sensory association linked to proper names, and contribute to the greater imagery values ascertained for this category.
Therefore mothers selected for this study were categorised within the 'deprived' category ascertained by the Welsh Index of Multiple Deprivation (WIMD) [ 26], which includes deprivation based on: Income, housing, employment, access to services, education, health, community safety and physical environment.
Ascertaining the relative contributions of both category of individual will be a difficult, but important, issue to reconcile.
