Comparison 1. Early post‐surgery imaging vs no early imaging.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Overall survival (deaths at 1 year)	1		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
1.1 HGG	1	125	Risk Ratio (M‐H, Random, 95% CI)	0.86 [0.61, 1.21]
1.2 LGG	0	0	Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
2 Overall survival (deaths at 2 years)	1		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
2.1 HGG	1	125	Risk Ratio (M‐H, Random, 95% CI)	1.06 [0.91, 1.25]
2.2 LGG	0	0	Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]