Psoriasis: A bibliometric analysis in the Arab World (2004-2019)

Background: Psoriasis is a relatively common inflammatory skin disease with systemic implications. Psoriasis data seem to arise from a select number of countries, while other areas in the world with different genetics and ethnicities, especially Arab countries have a questionable input. Aim: This study aims to quantitatively assess Arab countries contributions in psoriasis research. Methods: The number of publications related to psoriasis for each of the 22 Arab countries was found on PubMed for every year between 2004 and 2019, and then, the total for each country was normalised according to three parameters: average population, Gross Domestic Product and psoriasis disability-adjusted life years. In addition, the number of psoriasis articles was also retrieved for 2 other groups: South America and Far East Asia, for comparison. Results: Only 1.55% of all psoriasis research published between 2004 and 2019 originates from Arab countries (vs. 2.06% from South American countries and 15.2% from Far East Asian countries), and psoriasis articles make up only 0.15% of the total publications from Arab countries (vs. 0.10% for both South American and Far East Asian countries). Egypt scored the highest number of psoriasis-related articles and accounted on its own for almost half the number of psoriasis publications (47.9%) from Arab countries. When normalised according to the parameters, other Arab countries also rose to prominence; Kuwait had the highest number of publications per million persons, and Tunisia had the highest number of publications per GDP. However, Egypt ranked once again first as having the highest number of publications per 1% psoriasis-related DALY. Among the three parameters, the average population size proved to be the most strongly correlated with the number of psoriasis publications in a given country. Conclusion: There is an incontestable need for more research related to psoriasis in Arab countries as the numbers are still very low reflecting many difficulties standing In the way of research in general in the Arab world.