Table 2.

Prevalence proportion of current use and ever use of a gluten free diet in children 3–5 years old in the Study to Explore Early Development

		Crude		Adjusted†
	N	Prevalence %	95% CI	Prevalence %	95% CI
Current use
ASD	71	10.1	7.4, 14.0	11.1	8.2, 14.8
POP	11	1.1	0.8, 1.6	0.9	0.5, 1.8
Ever use
ASD	130	18.8	15.1, 23.3	20.4	17.3, 24.1

ASD, autism spectrum disorder; POP, Population controls; CI, confidence interval; ‘Current use,’ using a gluten free diet at time of study participation; Ever use, use of a gluten free diet either in the past or at study participation

Crude models adjusted only for site using a random intercept

^†Adjustment for maternal race/ethnicity, maternal education, maternal age at clinic visit (with spline at 36 years), child year of birth using inverse probability weights, site adjusted using a random intercept