Exploring factors associated with autism spectrum disorder diagnosis among children in primary care clinics in Kelantan, Malaysia

Table 3 Factors associated with ASD diagnosis among children in Kelantan analysed by multiple logistic regression (n = 207)

Variables	B	Adjusted OR (95% CI)	Wald Statistic (df)	p-value
Child factors
Child age (years)	0.27	1.30 (1.10,1.55)	8.94 (1)	0.003
Birth order
Second- or later-born		1
First-born	0.91	2.48 (1.08,5.71)	4.54 (1)	0.033

Candidate variables were selected based on univariable screening at p < 0.25 and clinical plausibility
No multicollinearity or interaction
Hosmer-Lemeshow test, p-value = 0.099
Classification accuracy = 86.0%
Area under the ROC curve was = 70.1%