Table 1.
Baseline characteristics of cohort participants at baseline and at age 19 (only participants with informed consent and with data from both medical records and questionnaires), and characteristics of the study population
| Entire study populationa | Cohort participants, baseline | Cohort participants retained until age 19 | |
|---|---|---|---|
| Number of births | 7895 | 5151 | 984 |
| Maternal education (%) | |||
| Primary | 45.4% | 40.1% | 21.2% |
| Secondary | 40.8% | 36.5% | 37.9% |
| University | 13.7% | 16.3% | 21.8% |
| Missing | – | 7.1% | 19.1% |
| Maternal marital status (%) | |||
| Married | 88.1% | 79.5% | 72.6% |
| Single | 8.8% | 8.9% | 6.2% |
| Divorced/widowed | 3.1% | 2.5% | 2.3% |
| Missing | – | 9.0% | 19.0% |
| Maternal age < 20 years | 13.3% | 9.9% | 6,5% |
| Birthweight (< 2500g) | 5.7% | 4.4% | 5.0% |
a
Study population: all birth in the Brno and Znojmo region III/1991-VI/1992, data from the national birth register.