Korean Vitrectomy Reoperation Rates by Surgery Day, 2011-2024

A nationwide retrospective cohort study of 387,544 adults in Korea who underwent initial vitrectomy between January 2011 and March 2024. The dataset compares reoperation rates within 90 and 180 days for surgeries performed on weekends/holidays versus weekdays. The analysis was conducted using the Korean Health Insurance Review and Assessment Service database.

Use Cases

• Analyze the association between surgery timing and reoperation risk based on the comparison of weekend/holiday and weekday cohorts.
• Investigate differential outcomes for specific diagnoses based on the subgroup analysis of the five most common vitrectomy indications.
• Validate statistical methods for time-to-event analysis based on the use of Cox proportional hazards regression for reoperation risk.
• Benchmark reoperation rates in a national healthcare system based on the reported rates per 100 person-months.

Strengths

• Large-scale study with 387,544 patient records.
• Nationwide coverage using the Korean Health Insurance Review and Assessment Service database.
• Longitudinal data spanning over 13 years from January 2011 to March 2024.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count for the underlying analytical dataset is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to the Korean healthcare system.

Provenance

Source

Korean Health Insurance Review and Assessment Service database.

Collection Method

Nationwide, population-based retrospective cohort study.

Time Range

January 2011 to March 2024.

Freshness

Last updated 2026-06-01 07:16:50; freshness should be verified.

Geography

South Korea.