# Table 1 Epidemiological characteristics of mothers and newborns

Non-smoking mothers (NSM) (n = 111) Smoking mothers (SM) (n = 58)
Maternal age at birth (years) 31.1 ± 5.7 (31.2; 16.0 – 46.4) 29.0 ± 6.0 (28.2; 18.5 – 40.4)
Cigarettes/day before pregnancy (n = 10) 11.3 ± 7.3 (12.0; 1.5 -20.0) (n = 58) 20.0 ± 9.3 (20.0; 2.0 – 40.0)***
Years of tobacco use 9.0 ± 4.4 (10.0; 2.0 – 20.0) 11.5 ± 5.7 (10.0; 2.0 – 24.0)
First trimenon (cigarettes/day) 0 12.3 ± 7.1 (10.0; 2.0 – 30.0)
Second trimenon (cigarettes/day) 0 11.4 ± 6.8 (10.0; 2.0 – 30.0)
Third trimenon (cigarettes/day) 0 11.7 ± 7.3 (10.0; 1.0 – 30.0)
Sex of newborn (male/female) (number) 60/51 37/21
Gestational age (weeks) 39.6 ± 1.4 (39.1; 37.3 – 41.7) 39.5 ± 1.5 (39.4; 37.1 – 41.7)
Birth weight (g) 3379.3 ± 429.9 (3380.0; 2330.0 – 4355.0) 3118.2 ± 497.7 (3040.0; 2190.0 – 4190.0)***1)
Birth length (cm) 50.4 ± 2.0 (51.0; 46.0 – 57.0) 49.1 ± 2.7 (49.0; 43.0 – 55.0)*** 1)
Head circumference (cm) 35.0 ± 1.3 (35.0; 32.0 – 38.0) 34.3 ± 1.2 (35.0; 32.0 – 37.0)* 2)
1. Values are given in mean ± standard deviation (median; range). Numbers of subjects, n.
2. Statistical differences (non-parametric Mann–Whitney-U test):
3. *** p < 0.001: higher than NSM value.
4. Statistical difference (parametric Student’s T test):
5. ***1) p < 0.001: lower than NSM values.
6. * 2) p < 0.05: lower than NSM value.