Variable	Remestemcel-L-rknd N=55	Ruxolitinib N=49	ORR P-Value**	ORR Final Model Rationale
Age (years)			0.98	Omitted due to difference in age inclusion
Median	7	57	criteria
Range	<1-17	18-72
Sex			0.39	Included-strongly imbalanced and potential effect modifier by key aGVHD clinical experts
Male (%)	64%	47%
Ethnicity		0.81		Included-strongly imbalanced and potential effect modifier by key aGVHD clinical experts
White (%)	56%	92%
Other (%)	44%	8%
Baseline aGVHD grade (%)*		0.40		Included-strongly imbalanced and potential effect modifier by key aGVHD clinical experts
II	11%	27%
III	42%	55%
IV	47%	18%