Table 2.

Search keywords in different groups

Group 1—ML keywords	Artificial intelligence, machine learning, deep learning, learning algorithms, supervised machine learning, unsupervised machine learning
Group 2—Medical keywords	Clinical deterioration, mortality, in-hospital mortality, death, vital sign, emergency departments
Group 3—Document type	Journal
Group 4—Publication year	1 January 2010 to 1 August 2021
Group 5—Language	English
Final result	(Group 1) AND (Group 2) AND (Group 3) AND (Group 4) AND (Group 5)

ML, machine learning.