Barriers and facilitators to diet, physical activity and lifestyle behavior intervention adherence: a qualitative systematic review of the literature

Table 1 Search syntax used in PubMed, Goggle Scholar, MEDLINE Ovid, Web of Science Core Collection, and Cochrane Library

Database	Outcome	Intervention			Study design	Dates	Population
PubMed	Barriers or facilitators or adher^a or prevent or motiv^a	Diet or nutrition	Exercise or physical activity	Weight loss	Qualitative	"2005/01/01"[Date—Entry]: "3000"[Date—Entry]	Humans, English, Adult: 19 + years
Google Scholar^b	Barriers or facilitators or adherence or prevent or motivation	Diet or nutrition	Exercise or physical activity	Weight loss	Qualitative	year 2005–2021
Medline (OVID)	Barriers or facilitators or adher^a or prevent or motiv^a or motivation/	Nutrition or diet/ or diet^a	Exercise/ or exercise or physical activity	Weight loss/ or weight loss	Qualitative research/ or qualitative	2005 to current	Human, English, all adults (19 plus years)
Web of Science	Barriers or facilitators or adher^a or prevent or motiv^a	Nutrition or diet^a	Exercise or physical activity	Weight loss	Qualitative	(2005–2021)	English, articles or Review articles
Cochrane Library	Barriers or facilitators or prevent or adher^a or prevent or motiv^a	Diet or nutrition	Exercise or physical activity	Weight loss	Qualitative

All search components (i.e., outcomes, intervention and study design) were combined using ‘and’. Dates and population components were added in as limits
^aTruncates term to include all words with alternative endings
^bGoogle scholar was searched informally

ISSN: 1479-5868