What type of study is this?

This is a Quantitative Study study.

Quantitative Assessment of Cholesteatoma using CT Hounsfield Units: A Retrospective Observational Study

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Retrospective observational study comparing Hounsfield units in cholesteatoma and healthy controls, indicating potential for improved diagnosis.

Cholesteatoma-affected ears showed significantly lower Hounsfield unit values compared to healthy controls.
HU values were recorded at five anatomical sites, revealing critical changes particularly in the malleus and lateral semicircular canal.
This retrospective observational study involved 150 participants, including 75 patients with unilateral cholesteatoma and 75 healthy controls.
Findings suggest that HRCT-derived HU measurements could enhance diagnostic confidence in assessing cholesteatoma-related changes.

Jijo et al. (2025) studied this question.

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Retrospective observational study comparing Hounsfield units in cholesteatoma and healthy controls, indicating potential for improved diagnosis.