Twenty Years of Chalazion Patient Records and Treatment Outcomes

A dataset from Clalit Health Services contains 611,993 chalazion diagnoses across 412,365 patients, recorded between January 2003 and December 2022. It was created by Yogev Giladi for a retrospective cohort study analyzing demographic data, medical history, treatments, procedures, and outcomes. The study found invasive procedures were required in 9.3% of cases and incidence correlated strongly with mean monthly temperature.

Use Cases

• Analyze treatment efficacy based on the reported outcomes for different topical therapies.
• Model demographic risk factors based on the age-dependent intervention rates described.
• Investigate environmental correlations based on the described link between chalazion incidence and monthly temperature.

Strengths

• Covers a 20-year period from 2003 to 2022, providing longitudinal insight.
• Includes a large patient cohort of 412,365 individuals with over 600,000 diagnoses.
• Contains detailed treatment and outcome data, including specific medication names and procedure rates.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic or temporal bias inherent to a single health service provider.

Provenance

Source

Clalit Health Services electronic medical record database.

Collection Method

Retrospective cohort study.

Time Range

January 2003 to December 2022.

Freshness

Last updated 2026-05-25 07:12:52; freshness should be verified.