Table 2 Prevalence of diarrhoea in first 3.5 years of life
Age periodASD cases (n)Rest of cohort (n)OR (95% CI)p Value
0–4 weeks2.7% (2)3.2% (392)0.82 (0.20 to 3.36)0.784
0–6 months33.3% (23)33.4% (3808)0.98 (0.59 to 1.62)0.934
6–18 months50.0% (37)51.3% (5637)0.91 (0.58 to 1.44)0.697
18–30 months56.3% (40)55.1% (5648)0.98 (0.61 to 1.57)0.925
30–42 months57.6% (38)44.0% (4396)1.68 (1.03 to 2.74)0.039
  • Odds ratios are relevant to children with no history of diarrhoea in the particular period, after taking account of the sex of the child. ASD, autistic spectrum disorder.