Table 2 Observed number of cases of autism spectrum disorder (ASD) both for the cohort as a whole (n = 92) and according to maternal iodine-to-creatinine ratio (I:Cr). In addition to the modelled predicted probability of a diagnosis of ASD (95% CIs) at the 25th, 50th and 75th centiles of I:Cr, for ‘average’ participantsa
From: Maternal iodine status in a multi-ethnic UK birth cohort: associations with autism spectrum disorder
Iodine-to-creatinine ratio I:Cr (μg/g), median (range) | (n) | Observed cases of autism spectrum disorder (ASD) (n) (percent) | Probability of a diagnosis of autism spectrum disorder (percent) (95%CIs) |
|---|---|---|---|
All participants: | 6973 | 92 (1·3%) |  |
Lower third: 59·5, (0·7 to 67) | 2325 | 28 (1·2%) | 1·0 (0·3 to 1·7) |
Middle third: 83·1, (67 to 105) | 2324 | 27 (1·2%) | 1·1 (0·4 to 1·8) |
Higher third: 121·9, (> 105) | 2324 | 37 (1·6%) | 1·5 (0·5 to 2·4) |