The phrase "a core item in" is correct and usable in written English.
It can be used to indicate that something is an essential or fundamental component within a larger context or system.
Example: "Sustainability is a core item in our company's strategy for long-term growth."
Alternatives: "a key element in" or "an essential part of".
The revised SAQ-C was a single-page questionnaire with 32 core items in five dimensions--teamwork climate, safety climate, job satisfaction, perception of management, and working conditions.
Social theories make assumptions about what counts as a social phenomenon and which concepts should be regarded as core items in this context (e.g. agency, interaction or communication) ([ 45], p. 237).
It is very important to report core items in hierarchical Bayesian analysis.
Polls consistently show that the vast majority of the public has almost no idea of where their tax dollars go. They tend to hugely overestimate the portion of the budget that goes to items such as food stamps, public broadcasting and foreign aid, and to underestimate the importance of Medicare, the military and other core items in the budget.
We adopted 51 of the 67 core items in the GIQ and added four more items on handling satisfaction as suggested by the focus group discussions.
The interRAI instruments comprise a suite of assessment tools to support assessment and care planning of persons with chronic illness, frailty, and disability across care settings, 18 with substantial reliability on core items in common.
The adjusted R2 for the model with nine core items regressed on item 24 showed that 70% of the variation in the general satisfaction score could be explained by the scores on the other nine core items in the total sample, ranging from 43% (alcohol and substance dependency care, inpatients) to 81% (psychiatric care, inpatients) in the subsamples.
We added a third core item to assess help-seeking in relation to self-injury, using the original matrix format.
The difference between the mean maximum scores of case and control patients ranged from 5.8 in the core item only score, to 6.9 in the score with all eight items.
