Table 1.

Information extraction items

Categories	Specific items
Study characteristics	Title, first author, journal name, publication year and type of study
Participants	Diagnostic criteria, sample size, gender, age, ethnicity, case source and baseline status
Intervention	Drug name, medication route, drug dose, course of treatment and patient compliance
Control	Drug name, medication route, drug dose, course of treatment and patient compliance
Outcomes	Whether there is an intention-to-treat, loss to follow-up and withdrawal, and outcomes
Risk of bias	Random sequence generation, allocation concealment, participant and personnel blinding, outcome assessment blinding, incomplete outcome data, selective reporting and other bias
Others	Author’s main conclusions, funding and others