Literature Search Strategy

Articles were identified through a computerized literature search using PubMed, MEDLINE, PsycINFO, and Google Scholar databases to find relevant studies using the search terms “epilep*” or “seizure disorder” and “olfact*” or “smell.” The search was conducted by a board-certified neuropsychologist, postdoctoral fellows in clinical neuropsychology, and advanced graduate and undergraduate research assistants. Studies were limited to English language articles that enrolled human subjects; studies which were not in English were excluded from the study. The last date of search was October 19, 2018 and included both full-text articles and abstracts. A thorough manual review of articles was performed using cross-references from identified original articles and reviews. Studies eligible for inclusion used performance-based measures of olfactory functioning, which provided statistical information that permitted meta-analytical methods to be used. Studies were selected and analyzed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA; Moher et al., 2009).