Purpose: The objective of this study was to evaluate the relationship between research activity and National Institutes of Health (NIH) funding status of the United States (US) academic ophthalmologists.
Methods: A retrospective cross-sectional analysis of bibliometric data was conducted. The NIH Research Portfolio Online Reporting Tools Expenditures and Reports (rePORTER) website was utilized to identify ophthalmology departments in the US that received NIH funding. Affiliated faculty from these institutions were then identified using NIH rePORTER and institutional websites. H-index was calculated using the Scopus database, and the NIH iCite tool was used to determine the Relative Citation Ratio (RCR). The h-index and w-RCR quantified research productivity, while m-RCR measured research impact.
Results: Data on 2688 faculty members from 66 departments we re identified, of which 21% were NIH-funded. Faculty members who received NIH-funding had significantly greater research productivity and impact as measured by h-index (32.5 vs 16.6; p < .001), m-RCR (2.2 vs 1.6; p < .001), and w-RCR (147.2 vs 70.1; p < .001) than their non-funded peers. When stratified by academic rank, NIH-funded faculty still had significantly higher h-index (16.1 vs 7.9; p < .001), m-RCR (2.2 vs 1.4; p < .001), and w-RCR (63.2 vs 61.8; p < .001) than non-funded peers. A similar trend was observed among non-tenured faculty members.
Conclusion: NIH funding is associated with higher research productivity and impact among US academic ophthalmologists as measured by h-index and RCR, which suggests that NIH funding may be a critical factor in enhancing scholarly contributions of ophthalmologists. These findings underscore the importance of continued investment in NIH funding to foster high-impact research within the field of ophthalmology.
Keywords: Academic ophthalmology; national institutes of health; relative citation ratio; research funding; research productivity.