In 2019, Ioannidis et al. (PLoS Biol 17(8): e3000384, DOI: 10.1371/journal.pbio.3000384) published the results of a meta-analysis of the world's nearly 7 million working researchers in 22 scientific fields and 176 subfields ranging from chemistry, physics, engineering, economics and business.

The 2022 list of world top 2% researchers includes about 200,400 top scientists from all over the world (see the full list available on: DOI: 10.17632/btchxktzyw.4).

The top 2% scientists were selected based on their academics’ scientific achievements measured by the standardized information on citations, h-index, co-authorship adjusted hm-index, citations to papers in different authorship positions and a composite indicator.

Associate Professor Muhammad J. A. Shiddiky has been ranked 81937th for his output in 2022-based ranking, improving from 99,375th in 2021 and 106,839th in 2020.

He has also been ranked at 478th worldwide in the subfield of Analytical Chemistry (out of 101089 scientists), improving from 652nd (out of 102,767)in 2021 and 777th (out of 87,137) in 2020.