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Table 2 Mean ages at events, National Survey of Children’s Health, 2016—2018

From: The diagnostic odyssey of autism: a cross-sectional study of 3 age cohorts of children from the 2016–2018 National Survey of Children’s Health

 

N

Weighted N

Weighted %

Age years (SE)

p-valuea

First developmental services

 

 Full sample

2164

1,502,230

100%

4.10 (0.10)

 

 Early childhood

284

219,126

14.6%

2.48 (0.08)

Ref

 Middle childhood

800

683,385

45.5%

3.98 (0.14)

 < 0.001

 Adolescence

1080

599,719

40.0%

4.81 (0.17)

 < 0.001

First intervention/education plan

 Full sample

2133

1,467,511

100%

4.43 (0.11)

 

 Early childhood

260

202,267

13.8%

2.48 (0.09)

Ref

 Middle childhood

779

666,613

45.4%

4.39 (0.18)

 < 0.001

 Adolescence

1094

598,631

40.8%

5.14 (0.15)

 < 0.001

First autism diagnosis

 Full sample

2303

1,598,915

100%

4.56 (0.13)

 

 Early childhood

293

221,409

13.8%

2.38 (0.08)

Ref

 Middle childhood

840

729,767

45.64%

4.26 (0.17)

 < 0.001

 Adolescence

1170

647,739

40.5%

5.64 (0.22)

 < 0.001

  1. aBolded p-values denote statistical significance at p < 0.05. All analyses were weighted to account for the complex survey design