The Hirsch Index and Self-Citation in Academic Physiatry Among Graduate Medical Education Program Directors

Area of Science:

• Bibliometrics and Scientometrics
• Academic Productivity Assessment
• Physical Medicine and Rehabilitation Research

Background:

• The Hirsch Index (h-index) is a key metric for evaluating academic output, balancing publication quantity and citation impact.
• Concerns exist regarding self-citation's potential to inflate the h-index, necessitating field-specific evaluations.
• Understanding research productivity benchmarks in physiatry is crucial for the field's academic development.

Purpose of the Study:

• To assess research output and the influence of self-citation on the h-index within physiatry.
• To establish a benchmark for academic productivity in physical medicine and rehabilitation.
• To identify variations in research metrics across different subspecialties of physical medicine and rehabilitation.

Main Methods:

• Identified program directors from physical medicine and rehabilitation residency and fellowship programs.
• Analyzed publication counts, citation numbers, self-citation rates, and h-indices for the identified cohort.
• Calculated h-indices with and without self-citations to evaluate its impact.

Main Results:

• The study included 169 program directors with a mean h-index of 5.7 ± 6.7.
• Excluding self-citations resulted in minimal changes to the h-index for most directors; 90% remained unchanged.
• Spinal cord injury fellowship directors exhibited significantly higher publication numbers (28), citations (672), and h-index (9.2) compared to other subspecialties.

Conclusions:

• Self-citation appears to be infrequent and has a negligible effect on the h-index in physical medicine and rehabilitation.
• Spinal cord injury fellowship directors possess demonstrably stronger academic profiles within the field.
• The findings provide valuable benchmarks for research productivity in physiatry and its subspecialties.