Comparison 2. Cooling plus xenon versus cooling alone: subgroup analysis by baseline severity of encephalopathy.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mortality	1	85	Risk Ratio (M‐H, Fixed, 95% CI)	1.31 [0.61, 2.84]
1.1 Infants with moderate/severe encephalopathy	1	85	Risk Ratio (M‐H, Fixed, 95% CI)	1.31 [0.61, 2.84]