Table 2

Methodological quality of included studies (STROBE criteria) in a meta-analysis on the impact of operation details on hydrocephalus after decompressive craniotomy.

Variable	First author and year
Variable	Honeybul & Ho, 201212	De Bonis et al, 201313	Takeuchi et al, 20132	Takeuchi et al, 201314	Wang et al, 201415	Wang et al, 201516
Title/abstract	+	+	+	+	+	+
Introduction
Background/rationale	+	+	+	+	+	+
Objectives	+	+	+	+	+	+
Methods
Study design	+	+	+	+	+	+
Setting	+	+	+	+	+	+
Participants	+	+	+	+	+	+
Variables	+	+	+	+	+	+
Data sources/measurement	+	+	+	+	+	+
Bias	+	+	-	-	+	+
Study size
Quantitative variables	+	+	+	+	+	+
Statistical methods	+	+	+	+	+	+
Results
Participants	-	+	+	+	+	+
Descriptive data	+	+	+	+	+	+
Outcome data	+	+	+	+	+	+
Main results	+	+	+	+	+	+
Other analyses	+	+	+	+	+	+
Discussion
Key results	+	+	+	+	+	+
Limitations	+	-	+	+	-	+
Interpretation	+	+	+	+	+	+
Generalizability	+	+	+	+	+	+
Funding information	+	+	-	-	-	+

+ = provided, - = not provided, STROBE - Strengthening the Reporting of Observational Studies in Epidemiology