Table 2.

Characteristics of included studies and their frequencies

	n (%)	Included studies
Publication year
2000–2010	9%	Elkis-Abuhoff D et al.(2009)
2011–2022	73%	Yaoli Li et al.(2017),Shufen Zhao et al.(2017),Shufen Zhao et al.(2019),Gürcan M and Atay Turan S(2020),Gürcan M and Atay Turan S(2021),Yakar H K et al.(2021),Lili Sun et al.(2021),Lingyu Su et al.(2022)
2023	18%	Moharamkhani M et al.(2023),Akbulak F and Can G(2023)
Research design
Qualitative studies	18%	Elkis-Abuhoff D et al.(2009),Gürcan M and Atay Turan S(2020)
Quantitative studies
Controlled trial	55%	Yaoli Li et al.(2017),Shufen Zhao et al.(2017),Shufen Zhao et al.(2019),Gürcan M and Atay Turan S(2020),Gürcan M and Atay Turan S(2021),Lili Sun et al.(2021),Lingyu Su et al.(2022)
Type of experimental studies	27%	Yakar H K et al.(2021),Moharamkhani M et al.(2023),Akbulak F and Can G(2023)
Country of origin
China	46%	Yaoli Li et al.(2017),Shufen Zhao et al.(2017),Shufen Zhao et al.(2019),Lili Sun et al.(2021),Lingyu Su et al.(2022)
Turkey	36%	Gürcan M and Atay Turan S(2020),Gürcan M and Atay Turan S(2021),Yakar H K et al.(2021),Akbulak F and Can G(2023)
United States Of America	9%	Elkis-Abuhoff D et al.(2009)
Iran	9%	Moharamkhani M et al.(2023)