Table 2.
Multivariate regression analysis
| Parameter | OR (95% CI)* |
|---|---|
| Body mass index | |
| <18.50 | 0.82 (0.62; 1.10) |
| 25.00–29.99 | 1.24 (1.10; 1.40)a |
| ≥30.00 | 1.92 (1.67; 2.20)a |
| Age (years) | |
| ≤19 | 1.14 (0.86; 1.51) |
| ≥36 | 1.35 (1.16; 1.58)a |
| Previous live births | |
| None | 1.52 (1.37; 1.70)a |
| Smoking | |
| ≤10 cigarettes per day | 1.15 (0.99; 1.34) |
| ≥11 cigarettes per day | 1.13 (0.91; 1.41) |
| Occupation of the mother | |
| Housewife | 0.99 (0.66; 1.48) |
| In training | 0.96 (0.62; 1.48) |
| On welfare support | 0.96 (0.64; 1.44) |
| Unskilled laborer | 1.01 (0.67; 1.53) |
| Skilled worker, public or private employee | 0.88 (0.61; 1.28) |
| Highly skilled worker, medium level public or private employee, self-employed with small or medium size business | 0.85 (0.57; 1.25) |
| Country of origin of the mother | |
| Central and Northern Europe (excluding Germany), North America | 0.99 (0.56; 1.75) |
| Mediterranean region | 1.06 (0.74; 1.52) |
| Eastern Europe | 1.18 (0.82; 1.69) |
| Middle Asia (including Turkey, Afghanistan, and Pakistan), North Africa (Arab countries) | 1.12 (0.82; 1.54) |
| Asia (excluding Middle Asia) | 1.31 (0.72; 2.38) |
| Other | 1.73 (1.05; 2.86) |
| Single mother | |
| Yes | 1.06 (0.91; 1.23) |
| Worked during pregnancy | |
| Yes | 1.03 (0.92; 1.14) |
OR were calculated with regard to the odds of having a neonate with a 5-min Apgar score of 0–6. References were: Apgar score of 7–10, BMI of 18.5–24.99, age of 20–35 years, ≥1 previous live births, non-smoker, classified in the most qualified occupational category (high level public employee, very highly skilled employee, etc.), mother born in Germany, not being a single mother, and not working during pregnancy
* OR adjusted for the following parameters: BMI, age previous live births, smoking status, occupation of the mother, country of origin of the mother, single mother status, and working during pregnancy
a P < 0.001