Skip to main content
. Author manuscript; available in PMC: 2019 Sep 1.
Published in final edited form as: J Autism Dev Disord. 2019 Sep;49(9):3786–3797. doi: 10.1007/s10803-019-04088-9

Table 3.

Statistics from bivariate analyses

Test (df, N, test statistic) = p-value
Autism Spectrum Disorder clinic Psychology clinic Overall
Year χ 2(3, N = 5040, 17.65) = p <.001 NS χ 2 (1, N = 10,268) = 17.50, p < .001
Child age χ 2 (3, N = 5040) = 18.35, p <.001 NS χ 2 (l, N = 10,098) = 82.51, p <.001
Child gender NS NS NS
Race χ2 (3, N = 4956) = 28.31, p <.001 χ2 (3, N = 5142) = 61.92, p <.001 χ2 (l, N = 10,098) = 82.51, p <.001
Insurance NS χ2 (1, N = 5228) = 12.04, p = .01 χ2 (1, N = 10,268) = 10.94, p < .001
Guarantor NS χ2 (1, N = 5228) = 9.38, p = .01 χ2(l, N = 10,268) = 6.03, p < .05
Distance to clinic Z (N = 10,190) = −3.13, p = .002 Z (N = 5119) = −7.34, p < .001 Z (N = 10,190) = −7.07, p < . 001,
Days until Appt. Z (N = 4593) = 2.66, p = .01 - -
Education NS NS NS
Internalizing χ2 (1, N = 3253) = 13.34, p < .001 χ2 (1, N = 1331) = 8.95, p < .001 χ2 (1, N = 4584) = 15.41, p < .001
Externalizing χ2 (1, N = 3253) = 16.51, p < .001 χ2 (1, N = 1331) = 12.31, p < .001 χ2 (1, N = 4585) = 25.28, p < .001
ASD NS NS NS
ADHD 2 (1, N = 3449) = 8.12, p = .01, NS χ2 (1, N = 4526) = 10.81, p <.001
Sleep problems χ2 (1, N = 4593) = 19.40, p <.001 NS χ2 (1, N = 5383) = 17.98, p<.001
Seizures NS NS NS
IQ - NS -
ADOS autism symptoms NS - -

NS = p > .05, non significant; χ2 = Chi square test; Z = Wilcoxon test