. Author manuscript; available in PMC: 2020 Dec 1.

Published in final edited form as: J Atten Disord. 2018 Sep 28;23(14):1691–1702. doi: 10.1177/1087054718799930

Table 4.

Estimated Caseness of ADHD: Definite ADHD group Only (National Survey of Children’s Health, 2007–2012).

	2007–2008					2011–2012					Change 2008–2012
Comorbid classification													95% Cl absolute change
Comorbid classification	n	Cumulative n	%		Cumulative %	n	Cumulative n	%		Cumulative %	Absolute Δ	RelativeΔ	95% Cl absolute change
Externalizing	533	533		19.56	19.56	581	581		15.16	15.16	−4.40	−22.5	[−6.27, −2.52]
comorbidities only
Internalizing	378	1,465		13.87	33.43	495	1,805		12.92	28.08	−0.95	−6.9	[−2.63, 0.72]
comorbidities only
Both externalizing	554	1,087		20.33	53.76	729	1,310		19.02	47.10	−1.31	−6.4	[−3.26, 0.65]
and internalizing
comorbidities
None	1,260	2,725		46.24	100.00	2,027	3,832		52.90	100.00	6.66	14.4	[4.21,9.1 1]

Note. The total N in this table may not match up exactly with the total weighted frequency of Definite ADHD in Tables 1 and 2 due to missing data of comorbidities and weighting. Weighted frequencies are rounded to the nearest integer. CI = confidence interval.