Table 4.

Multivariate analysis of factors associated with a delayed diagnosis (age > 36 months)

Factor	Odds ratio	P-value	95% CI
Lower SCI level	0.62	0.121	0.34, 1.14
Lower RRB level	0.67	0.225	0.35, 1.28
Lower amount of Initial Screen Time (hours per day)	0.82	0.031*	0.68, 0.98
Sibling(s) with language/speech delay	3.30	0.220	0.49, 22.14
Speech/language/communication concerns	1.85	0.071	0.95, 3.61
Older age when medical attention was first sought for concerns	5.33	< 0.001*	3.35, 8.48
Factors excluded after univariate analysis	Odds ratio	P-value	95% CI
Higher amount of screen time at diagnosis (hours per day)	1.03	0.776§	0.83, 1.29
Number of siblings with ASD	1.22	0.724§	0.40, 3.73

Notes:

^*significant results;

^§not included in the multivariate analysis, as P > 0.25 in the univariate analysis