Elective arthroplasty on “high-risk” calendar dates: no evidence for worse outcomes in 43,000 procedures - Report - MDSpire
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Impact of Scheduling Elective Arthroplasty on "High-Risk" Dates: Analysis of 43,000 Procedures Reveals No Adverse Outcomes

  • By

  • Nike Walter

  • David W. Lowenberg

  • Christian Heiss

  • Edmund C. Lau

  • Markus Rupp

  • August 22, 2026

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Clinical Report: Impact of Scheduling Elective Arthroplasty on High-Risk Dates

Overview

This study analyzed 43,000 elective arthroplasty procedures to determine the impact of scheduling on 'high-risk' dates, specifically Friday the 13th. The findings indicate no significant differences in complication rates or mortality for surgeries performed on this date compared to other Fridays.

Background

Superstitions, such as the belief that Friday the 13th is an unlucky day, may influence surgical scheduling and patient perceptions. This study investigates whether these superstitions have any real impact on the outcomes of total knee and hip arthroplasties.

Data Highlights

No significant differences were found in complication rates or mortality for surgeries performed on Friday the 13th compared to other Fridays.

Key Findings

  • No adverse outcomes were associated with total knee or hip arthroplasties performed on Friday the 13th.
  • The frequency of surgeries on Friday the 13th was similar to that on other Fridays.
  • Complication rates for septic and aseptic revisions were not significantly different between the two groups.
  • Patient survival rates post-surgery were comparable regardless of the date of the procedure.
  • The study utilized a large dataset from Medicare records, enhancing the reliability of the findings.

Clinical Implications

This study provides data on scheduling elective arthroplasties on perceived 'unlucky' days.

Conclusion

The analysis indicates that scheduling elective arthroplasties on Friday the 13th does not adversely affect surgical outcomes.

Related Resources & Content

  1. Postponement of total joint replacement correlates with elevated 90-day revision rates and a rise in postoperative complications, Springer, 2022
  2. Creation of a straightforward clinical scoring system to assess the risk of adverse events during hospitalization following elective hip arthroplasty, Springer, 2025
  3. Impact of Surgeon Caseload on Total Hip Arthroplasty Outcomes: A Systematic Review and Meta-Analysis, Springer, 2026
  4. Timing Guideline | AAHKS, AAHKS, 2023
  5. Elevated incidence of complications following treatment for associated versus isolated acetabular fractures: a comparative analysis of short-term adverse events
  6. No Weekend Effect in Elective Primary Total Knee Arthroplasty: A Nationwide Analysis of 437,121 U.S. Cases
  7. Analysis of the Dutch Arthroplasty Register
  8. Timing Guideline | AAHKS
  9. lob p Global patient safety report 2024 2024

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