Background: Web of Science, Scopus, and Google Scholar are three major sources which provide h-indices for individual researchers. In this study we aimed to compare the h-indices of the academic pediatricians of Mashhad University of Medical Sciences obtained from the above mentioned sources. Method: Academic pediatrician who had at least 5 ISI indexed articles entered the study. Information required for evaluating the h-indices of the included researchers were retrieved from official websites Web of Science (WOS), Scopus, and Google Scholar (GS). Correlations between obtained h-indices from the mentioned databases were analyzed using Spearrman correlation coefficient. Ranks of each researcher according to each database h-index were also evaluated. Results: In general, 16 pediatricians entered the study. Computed h-indices for individual authors were different in each database. Correlations between obtained h-indices were: 0.439 (ISI and Scopus), 0.488 (ISI and GS), and 0.810 (Scopus and GS). Despite differences between evaluated h-indices in each database for individual authors, the rankings according to these h-indices were almost similar. Conclusion: Although h-indices supplied by WOS, SCOPUS, and GS can be used interchangeably, their differences should be acknowledged. Setting up ReasercherID in WOS and User profile in GS, and giving regular feedback to SCOPUS can increase the validity of the calculated h-indices.
Key words: SCOPUS; ISI; Web of Science; Google Scholar; Pediatric; Mashhad; H-index..