Table 2 Age-adjusted associations of breastfeeding and autistic disorder for children aged 2–18 years.

No Breastfeeding

2.48

(1.42 – 4.35)

0.001

Breastfeeding <2 months

1.70

(1.00 – 2.88)

0.050

Breastfeeding 2–6 months

1.27

(0.75 – 2.14)

0.373

Breastfeeding >6 months

reference

Limited to cases with reported regression in development

No Breastfeeding

1.95

(1.01 – 3.78)

0.048

Breastfeeding <2 months

1.84

(0.98 – 3.44)

0.057

Breastfeeding 2–6 months

1.59

(0.86 – 2.96)

0.141

Breastfeeding >6 months

reference