Table 1. Characteristics of subjects and parents.
| Participants | Healthy full-term infants |
|---|---|
| Total number (n) | 130 |
| Girls/Boys (n) | 69/61 |
| Gestational age (week) | 37+0–42+2 |
| Mothers age (years), mean(SD) | 31(4) |
| Fathers age (years), mean(SD) | 33(5) |
| Firstborn (n) | 53 |
| Second born (n) | 43 |
| Third born (n) | 26 |
| Fourth born (n) | 6 |
| Fifth born (n) | 1 |
| Mother’s education | |
| Secondary professional education (n) | 22 |
| Secondary academic education (n) | 6 |
| College/university education (n) | 102 |
| Mother’s occupation | |
| Employed (n) | 98 |
| Parental leave (n) | 16 |
| Unemployed (n) | 2 |
| Missing answers (n) | 14 |
| Father’s education | |
| Primary education (n) | 1 |
| Secondary professional education (n) | 28 |
| Secondary academic education (n) | 5 |
| College/university education (n) | 96 |
| Father’s occupation | |
| Employed (n) | 114 |
| Parental leave (n) | 0 |
| Unemployed (n) | 1 |
| Missing answers (n) | 16 |
| Nationality of parents | |
| 2 Swedish parents (n) | 122 |
| 1 Swedish parent and1 non-Swedish European parent (n) | 4 |
| 1 Swedish parent and1 non-Swedish non-European parent (n) | 3 |
| 2 non-Swedish non-European parents (n) | 1 |
Number of subjects (n), Standard Deviation (SD),