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

Published in final edited form as: J Autism Dev Disord. 2019 Apr;49(4):1455–1474. doi: 10.1007/s10803-018-3834-0

Table 5.

ASD prevalence rate among 8-year-olds reported by the CDC ADDM Network along with the estimated prevalence rate of ASD-R_I, ASD-R_N, and ASD-C among 8-year-olds from the same birth years in our cohort

Birth year	Surveillance year	CDC prevalence (range)^a	ASD-C prevalence (95% CI)^b	ASD-R_N prevalence (95% CI)^c	ASD-R_I prevalence (95% CI)^c
1992	2000	0.67 (0.45, 0.99)	0.43 (0.32, 0.54)	1.39 (1.16, 1.66)	2.57 (2.26, 2.91)
1994	2002	0.66 (0.33, 1.06)	0.61 (0.47, 0.76)	1.65 (1.35, 1.91)	2.90 (2.57, 3.29)
1996	2004	0.80 (0.46, 0.98)	0.90 (0.72, 1.09)	1.92 (1.52, 2.30)	3.01 (2.66, 3.48)
1998	2006	0.90 (0.42, 1.21)	1.21 (0.93, 1.49)	2.14 (1.57, 2.59)	2.82 (2.39, 3.23)
2000	2008	1.13 (0.48, 2.12)	1.44 (1.09, 1.82)	2.29 (1.56, 2.96)	2.46 (1.98, 2.89)
2002	2010	1.47 (0.57, 2.19)
2004	2012	1.46 (0.82, 2.46)
2006	2014	1.68 (1.31–2.93)

Abbreviations: ASD: Autism Spectrum Disorder; CDC: Centers for Disease Control; ADDM: Autism and Developmental Disabilities Monitoring; ASD-C: clinically-diagnosed ASD; ASD-R: research-defined ASD (narrow and inclusive)

Average of the CDC ADDM Network ASD prevalence estimates (per 100 children) at different ADDM network sites. Range for CDC estimates represents the range the CDC prevalence at different ADDM network sites (Christensen et al. 2016).

ASD-C: prevalence estimates per 100 children for clinically diagnosed ASD; 95% CI for the ASD-C is 95% a credible interval for the ASD-C prevalence.

ASD-R_N and ASD-R_I: research-defined ASD (narrow and inclusive, respectively); 95% CIs for the ASD-R_I and ASD-R_N are 95% credible intervals for the ASD-R_I and ASD-R_N prevalences, respectively.