Seasonal Variation and Meteorological Determinants of Surgical Site Infection After Orthopedic Surgery: A Nationwide Cohort Study in Japan

Seasonal variation and meteorological determinants of surgical site infection after orthopedic surgery: a nationwide retrospective cohort study using the JANIS database - JANIS-SSI Season Study

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000060877

Enrollment

920000

Registered

2026-03-09

Start date

2025-08-06

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Orthopedic surgery

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Orthopedic surgical procedures recorded in the Japan Nosocomial Infections Surveillance (JANIS) database between January 2012 and April 2025 will be included.

Exclusion criteria

Exclusion criteria: Procedures with missing data for variables required in the primary multivariable analysis, including age, sex, surgery type, operative time, wound class, ASA classification, emergency surgery status, implant use, hospital identifier, or surgery date, will be excluded.

Design outcomes

Primary

Measure	Time frame
Occurrence of surgical site infection (SSI) after orthopedic surgery as recorded in the Japan Nosocomial Infections Surveillance (JANIS) database. Superficial incisional SSI occurring within 30 days after surgery and deep incisional or organ/space SSI occurring within 30 days (without implant) or within 1 year (with implant) were included according to standard surveillance definitions.	—

Countries

Japan

Contacts

Public ContactTetsuhiko Mimura

Shinshu University School of Medicine Department of Orthopaedic Surgery

tettim3@yahoo.co.jp0263-37-2659

Outcome results