Table 1

Review of eligibility criteria based on adult population, concept, context and types of evidence

	Inclusion	Exclusion
Population	Human participants aged 18 years or older	Human participants aged less than 18 years Animal studies
Concept	Studies that evaluate postoperative outcomes of oesophagectomies Studies that evaluate the economic outcomes of oesophagectomies
Context	Exploring the economic burden of complications following oesophagectomy
Types of evidence	Primary empirical research studies (eg, randomised controlled trials, cohort studies, cross-sectional studies, case reports, economic studies) Full-text articles Full-text conference proceedings Grey literature produced by organisations outside of the traditional publishing and distribution channels including hospital annual reports and government documents reporting on costs of complications postoesophagectomy Articles written in English	Editorial articles (eg, perspective pieces, position statements) Protocols for planned studies Abstracts or posters Articles for which we cannot obtain the full text Articles that are not written in English Dissertations