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Table 1 Descriptive characteristics of pooled sample, National Survey of Children’s Health, 2016—2018 (n = 2303)

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

 

Total (N = 2303) or %

Total weighted % (95% CI)

Early childhood N (%)

Middle childhood N (%)

Adolescence N (%)

p-valuea

Total

2303

2.43% (2.43, 2.44)

293 (13.8%)

840 (45.6%)

1170 (40.5%)

 

Weighted population size, No

1,598,915

221,409

729,767

647,739

Sex

n = 2303

 Male

1855

78.4%

240 (77.5%)

676 (77.2%)

939 (80.2%)

0.79

 Female

448

21.6%

53 (22.5%)

164 (22.8%)

231 (19.9%)

Race/Ethnicity

n = 2303

 Non-hispanic white

1584

45.7%

175 (39.9%)

543 (37.0%)

866 (57.5%)

 < 0.001

 Non-hispanic black

160

14.9%

29 (20.5%)

57 (13.9%)

74 (14.2%)

 Hispanic/Latinx

277

31.5%

48 (31.5%)

116 (39.4%)

113 (22.5%)

 Other or multiracial

282

7.9%

41 (8.2%)

124 (9.7%)

117 (5.8%)

Severity of ASD

n = 2303

 Mild

1036

39.2%

109 (47.1%)

378 (36.3%)

549 (39.7%)

0.19

 Moderate

858

42.4%

124 (33.0%)

326 (46.5%)

408 (41.1%)

 Severe

237

9.8%

39 (14.0%)

75 (7.6%)

123 (10.8%)

 Missing

172

8.6%

21 (5.9%)

61 (9.6%)

90 (8.4%)

Parental education

n = 2298

 High school graduate (or less)

387

34.6%

52 (33.0%)

154 (41.4%)

181 (27.2%)

0.25

 AA or Some college

595

23.5%

65 (25.0%)

218 (19.9%)

312 (27.2%)

 Bachelor’s degree (or higher)

1316

41.8%

176 (41.0%)

467 (38.7%)

673 (45.7%)

Family income, % of FPL

n = 2303

  < 100%

321

26.5%

46 (29.0%)

131 (27.0%)

145 (25.6%)

0.47

 100–199%

451

26.8%

57 (27.5%)

182 (30.8%)

212 (22.7%)

 200–399%

711

24.2%

99 (24.2%)

242 (21.3%)

370 (25.4%)

  > 400%

820

22.5%

92 (19.3%)

285 (20.9%)

443 (26.3%)

Family structure

n = 2303

 Two-parent household

1684

69.8%

225 (67.7%)

615 (73.0%)

844 (67.0%)

0.42

 Other household/missing

619

30.2%

68 (32.3%)

225 (27.0%)

326 (33.1%)

Presence of older sibling

n = 2303

 Yes

563

36.2%

118 (48.5%)

285 (48.8%)

160 (17.8%)

 < 0.001

 No

1740

63.8%

175 (51.5%)

555 (51.1%)

1010 (82.3%)

Type of healthcare provider to diagnose

n = 2303

 Specialist

822

32.6%

128 (40.0%)

291 (30.6%)

403 (32.3%)

0.26

 Primary care physician

281

12.6%

38 (16.3%)

108 (12.5%)

135 (11.3%)

 School psychologist

257

14.3%

27 (10.8%)

99 (17.5%)

131 (11.9%)

 Non-school psychologist

378

13.6%

39 (15.5%)

149 (12.9%)

190 (13.7%)

 Psychiatrist

275

9.7%

20 (4.4%)

94 (8.7%)

161 (12.7%)

 Other, unknown or missing

290

17.3%

41 (12.9%)

99 (17.9%)

150 (18.1%)

  1. aBolded p-values denote statistical significance at p < 0.05. ASD autism spectrum disorder. FPL % of federal poverty level
  2. All analyses were weighted to account for the complex survey design