Table 1.
Summary statistics of population characteristics using the SELMA pregnancy cohort (N = 678). (*) The WQS index is derived from a WQS sex-stratified interaction model of 26 EDCs associated with child IQ at 7 years of age, adjusted by covariates.
| Mean | SD | ||
|---|---|---|---|
| Exposure | WQS index associated with 7-year IQ (sex-stratified, decile-scaled) * |
2.24 | 0.50 |
| Maternal characteristics | Graduated college n (%) | 467 (69) | |
| My Nutrition Index (MNI) | 66.8 | 14.0 | |
| Energy (kcals) | 1895 | 545 | |
| Age at birth (years) | 31.3 | 4.6 | |
| Weight in 1st trimester of pregnancy (kg) | 68.8 | 13.5 | |
| IQ (Raven) | 114.8 | 14.9 | |
| Parity | 1.8 | 0.86 | |
| Smoked in 1st trimester pregnancy n (%) | 74 (11) | ||
| Creatinine (mmol/L) | 10.4 | 4.7 | |
| Child characteristics | Female n (%) | 346 (51) | |
| Premature birth n (%) | 25 (3.7) | ||
| Full Scale WISC IQ at 7 years | 99.9 | 12.7 |