Table 1. Quality variables of included studies.

Study	Randomization technique	Concealment	Blinding	Intention to treat analysis	Ethical approval	Registration number	Power calculation
Jaafar 2020 (7)	Manually	Sealed envelope	Double	Reported	Reported	NCT02619149	Reported, power not achieved
Park 2023 (8)	Computer generated	Serial opaque sealed envelope	Double	Reported	Not reported	NCT04661371	Reported, power achieved
van Braak 2022 (9)	Computer generated	Independent programmer	Not reported	Reported	Reported	NTR5802	Reported, power achieved