Subsequent injury definition, classification, and consequence.

Area of Science:

• Sports Medicine
• Occupational Health
• Injury Epidemiology

Background:

• Recurrent injuries pose a significant challenge in athletic and occupational settings, impacting performance and health.
• Clear definitions of injury recurrence are essential for accurate data analysis and effective prevention strategies.

Purpose of the Study:

• To investigate how different definitions of "recurrent injury" influence the classification of subsequent injury types and their outcomes.
• To analyze the impact of injury definitions on the distribution and consequences of subsequent injuries in circus artists.

Main Methods:

• A secondary analysis was performed on prospective injury data collected from 1281 circus artists.
• Subsequent injuries were categorized as new, local, or recurrent, and stratified by occurrence timing (early, late, delayed) relative to the index injury.
• Injury outcomes were assessed using return to full participation (RTP) dates or last treatment dates.

Main Results:

• Recurrent and local injuries were less frequent than new injuries, both for medical attention injuries (7.5%-8.3% recurrent, 4%-7% local) and time loss injuries (81%-87% new).
• Time loss injuries demonstrated a later recurrence pattern compared to medical attention injuries.
• The temporal distribution (early, late, delayed) of injuries remained consistent across new, local, and recurrent injury types, irrespective of the definition used.

Conclusions:

• While the definition of recurrent injury did not alter the temporal patterns of injury occurrence, local and recurrent time loss injuries were more prevalent than medical attention injuries.
• Clear and consistent definitions are vital when reporting recurrent injury data to ensure accurate interpretation and inform effective injury prevention programs in high-risk professions like circus arts.