Table 1.
Characteristics of the study cohort consisting of 982 mother–infant pairs with deliveries 2002–2004 in two districts of eastern Slovakia.
| Characteristic | No. (%) | Characteristic | No. (%) |
|---|---|---|---|
| District | Maternal smoking | ||
| Michalovce | 702 (71.5) | No | 613 (62.4) |
| Svidnik | 280 (28.5) | Yes | 357 (36.4) |
| Maternal age (years) | Missing | 12 (1.2) | |
| ≤19 | 84 (8.6) | Maternal alcohol consumption | |
| 20–29 | 689 (70.1) | No | 673 (68.5) |
| ≥30 | 209 (21.3) | Yes | 298 (30.4) |
| Maternal education | Missing | 11 (1.1) | |
| Basic schooling | 204 (20.8) | Parity | |
| High school without graduation | 260 (26.5) | 0 | 404 (41.2) |
| High school with graduation | 443 (45.1) | 1 | 328 (33.4) |
| More than college/university | 72 (7.3) | 2 | 171 (17.4) |
| Missing | 3 (0.3) | 3 | 75 (7.6) |
| Sex of child | 4 | 2 (0.2) | |
| Male | 503 (51.2) | Missing | 2 (0.2) |
| Female | 479 (48.8) | Maternal allergy history | |
| Ethnicity | No | 937 (95.4) | |
| Slovakian/other eastern European | 757 (77.1) | Yes | 35 (3.6) |
| Romani | 215 (21.9) | Missing | 10 (1.0) |
| Missing | 10 (1.0) | Maternal asthma history | |
| Marital status | No | 973 (99.1) | |
| Married or living with partner | 905 (92.2) | Yes | 9 (0.9) |
| Never married | 59 (6.0) | Maternal respiratory history | |
| Divorced | 7 (0.7) | No | 774 (78.8) |
| Missing | 11 (1.1) | Yes | 198 (20.2) |
| Missing | 10 (1.0) | ||