Comparison 6. Safety: encephalitis or encephalopathy.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
6.1 Case‐control: MMR (risk interval from 0 to 90 days)	1		Odds Ratio (IV, Random, 95% CI)	Subtotals only
6.2 Self‐controlled case series/person‐time cohort	2		Rate Ratio (IV, Random, 95% CI)	Subtotals only
6.2.1 Self‐controlled case series: MMR	1		Rate Ratio (IV, Random, 95% CI)	1.34 [0.52, 3.46]
6.2.2 Person‐time cohort: MMR	1		Rate Ratio (IV, Random, 95% CI)	0.72 [0.36, 1.43]