*2.1. Inclusion Criteria*

Based on the J.B.I. recommendations regarding the mnemonic "P.C.C." for scoping reviews, the inclusion criteria will include: participants—this review will consider studies that include undergraduate nursing students; concept—this review will consider studies exploring nursing students' clinical training changes during the COVID-19 pandemic; context—this review will consider studies, independently of the country of the study, conducted in any clinical practice setting; and types of sources—this scoping review will consider any quantitative, qualitative, mixed methods study designs, editor letters and guidelines for inclusion. Additionally, all types of systematic reviews will be considered for inclusion in the proposed scoping review.

## *2.2. Search Strategy*

The search strategy will locate both published and unpublished primary studies and reviews.

Two reviewers developed the search strategy, which was peer-reviewed by the expert third reviewer considering the Peer Review of Electronic Search Strategies (PRESS) checklist [20]. The J.B.I.'s recommended three-step search strategy will be applied [16,18]. A limited preliminary search was undertaken on MEDLINE (via PubMed) and CINAHL Complete (EBSCOhost) to find articles on the topic. Thus, the text words in the titles and abstracts of pertinent articles and the index terms used to describe the articles were used to create a full search strategy for MEDLINE (via PubMed), as seen in Table 1. The search was conducted on 17 January 2022. The search strategy will be adapted to the specificities of each information source. Lastly, the reference lists of the articles included in the review will be screened for supplementary papers.

**Table 1.** Search strategy for MEDLINE (via Pubmed).


Study languages will be restricted to those mastered by the authors—English, Spanish and Portuguese—in order to ensure a good-quality selection procedure and data extraction. Document studies in other languages, excluded based on language, will be stated for transparency in the scoping review report.

The databases to be searched will include MEDLINE (via PubMed), CINAHL complete (EBSCOhost), Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, LILACS, Scopus, and scientific libraries, such as SciELO. The search

for unpublished studies will include DART-Europe; OpenGrey or other grey literature (e.g., Editor letters or guidelines).
