Table 1 Description of the study population characteristics (n = 141)
Characteristic | mean (SD) | no. | % |
|---|---|---|---|
Mother | |||
 age (years) | 30.3 (4.3) |  |  |
 pre-gestational body mass index | 25.2 (5.0) |  |  |
educational level | |||
 Low |  | 16 | 11.5 |
 Middle |  | 53 | 37.6 |
 High |  | 72 | 51.1 |
Parity | |||
 1 |  | 63 | 44.6 |
 2 |  | 56 | 39.8 |
 3 |  | 22 | 15.6 |
smoking behaviour | |||
 never smoked |  | 98 | 69.5 |
 before pregnancy |  | 33 | 23.4 |
 during pregnancy |  | 10 | 7.1 |
Newborn | |||
 sex, male |  | 74 | 52.5 |
 gestational age (weeks) | 39.5 (1.1) |  |  |
 birth weight (g) | 3463 (405) |  |  |
 birth length (cm) | 50.4 (1.8) |  |  |
 head circumference (cm) | 34.4 (1.3) |  |  |
 placental weight (g) | 510 (103) |  |  |