. Author manuscript; available in PMC: 2022 Mar 1.

Published in final edited form as: J Am Acad Child Adolesc Psychiatry. 2020 Jun 27;60(3):388–397. doi: 10.1016/j.jaac.2020.04.015

Table 1.

Participant Demographics

	All		EC-DMDD		No EC-DMDD
N	425		26		362		t	df	p
Age at baseline (years), SD	4.66	.85	4.76	.81	4.63	.86	0.775	386	0.439
							χ²	df	p
Female	217	51.1%	8	30.8%	192	53.0%	4.82	1	0.028
Ethnicity
African American	212	49.9%	15	57.7%	186	51.4%	1.12	3	0.772
Latino/Hispanic	127	29.9%	8	30.8%	107	29.6%
White	79	18.6%	3	11.5%	63	17.4%
Other	7	1.6%	0	0.0%	6	1.7%
							t	df	p
Poverty (receiving services)	209	49.2%	17	65.4%	179	49.4%	2.47	1	0.116

Note: Mean age with standard deviation (SD). For all other categories, number of participants and percentage of total, in parentheses, shown. n=425 children at T1 and n=403 at T2 had irritability data, and n=388 had impairment data at both T1 and T2 (early childhood disruptive mood dysregulation disorder [EC-DMDD] profile analyses required irritability and impairment data). T1 = timepoint 1; T2 = timepoint 2.