This lower bound differed across disciplines, countries, journals, reaching 40% for some #subcorpora. We show that #LLMs have had an unprecedented impact on #scientificwriting in #biomedicalresearch, surpassing the effect of major world events such as the COVID pandemic

biomedical abstracts from 2010 to 2024 indexed by #PubMed & show how the appearance of #LLMs led to an abrupt increase in the frequency of certain style words. This excess word analysis suggests that at least 13.5% of 2024 abstracts were processed with LLMs. This lower bound differed across disciplines, countries, journals, reaching 40% for some #subcorpora. We show that LLMs have had an unprecedented impact on scientific writing in biomedical research, surpassing the effect of major world