Table 1 Databases and search terms

PubMed

1. “Nutritive value” AND “vendors” AND “measurement”. [MeSH Terms] OR [All Fields]

2. “Vendors” AND “food analysis” AND (surveys and questionnaires). [MeSH Terms] OR [All Fields]

3. “Commerce” AND “nutrition audits”. [MeSH Terms] OR [All Fields]

4. “Commerce” AND “nutritional characteristics”.[MeSH Terms] OR [All Fields]

5. “Nutrition audits” AND “food outlet”. [MeSH Terms] OR [All Fields]

6. “Food analysis” AND “retail food environment” AND (Surveys and questionnaires). [MeSH Terms] OR [All Fields]

7. “Street food” AND “nutrition values”. [MeSH Terms] OR [All Fields]

8. “Mobile food vendors” AND “Assessment”. [MeSH Terms] OR [All Fields]

Web of Science

1. (TS = (nutritive value AND vendors AND measurement)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

2. (TS = (vendors AND food analysis AND surveys and questionnaires)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

3. (TS = (commerce AND nutrition audits)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

4. (TS = (commerce AND nutritional characteristics)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

5. (TS = (nutrition audits AND food outlet)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

6. (TS = (food analysis AND retail food environment AND surveys and questionnaires)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

7. (TS = (street food AND nutritive value)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

8. (TS = (Mobile food vendors AND Assessment)) AND DOCUMENT TYPES: (Article OR Abstract of Published Item)

Scopus

1. (TITLE-ABS-KEY (nutritive AND value) AND TITLE-ABS-KEY (vendors) AND TITLE-ABS-KEY (measurement))

2. (TITLE-ABS-KEY (vendors) AND TITLE-ABS-KEY (food AND analysis) AND TITLE-ABS-KEY (surveys) AND TITLE-ABS-KEY (questionnaires))

3. (TITLE-ABS-KEY (vendors) AND TITLE-ABS-KEY (food AND analysis) AND TITLE-ABS-KEY (surveys) OR TITLE-ABS-KEY (questionnaires))

4. (TITLE-ABS-KEY (commerce) AND TITLE-ABS-KEY (nutrition AND audits))

5. TITLE-ABS-KEY (commerce) AND TITLE-ABS-KEY (nutritional AND characteristics))

6. (TITLE-ABS-KEY (nutrition AND audits) AND TITLE-ABS-KEY (food AND outlet))

7. (TITLE-ABS-KEY (food AND analysis) AND TITLE-ABS-KEY (retail AND food AND environment) AND TITLE-ABS-KEY (surveys) OR TITLE-ABS-KEY (questionnaires))

8. (TITLE-ABS-KEY (street AND food) AND TITLE-ABS-KEY (nutritive AND value))

9. (TITLE-ABS-KEY (mobile AND food AND vendors) AND TITLE-ABS-KEY (assessment))

LILACS

1. (nutritive value and vendors) AND measurement

2. “Vendors” AND “food analysis” AND “surveys” AND “questionnaires”

3. “Commerce” AND “nutrition audits” AND (la:(“en”))

4. “Commerce” AND “nutritional characteristics” AND (la:(“en” OR “es”))