Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Socioeconomic characteristic of parents.
| Parameters | Number N (%) |
|---|---|
| Maternal age | |
| ≤25 years | 43 (8.7%) |
| 26–35 years | 364 (73.4%) |
| ≥36 years | 89 (17.9%) |
| Paternal age | |
| ≤25 years | 21 (4.2%) |
| 26–35 years | 329 (66.3%) |
| ≥36 years | 146 (29.5%) |
| Maternal education | |
| Primary | 19 (3.8%) |
| Secondary | 157 (31.7%) |
| Higher | 320 (64.5%) |
| Paternal education | |
| Primary | 16 (3.2%) |
| Secondary | 156 (31.5%) |
| Higher | 324 (65.3%) |
| Maternal self-assessment of economic status | |
| Low | 8 (1.6%) |
| Average | 234 (47.2%) |
| High | 254 (51.3%) |
