School education among 178 VLBW boys with known schooling
| School | Observed | Expected |
|---|---|---|
| <9 years of education | 0 | 0.2 |
| 9 years of education | 6 | 3.9 |
| <3 years of “gymnasium” | 109 | 88.9 |
| 3+ years of “gymnasium” | 59 | 76.4 |
| Postgymnasial education | 4 | 8.7 |
The Swedish “gymnasium” represents grades 10–13 and is equivalent to upper secondary school in the UK and to senior high school in the US.