Birth variables : year of inclusion in delivery records, Gothenburg, Sweden
| Variable | Home births1-150 | Hospital delivery† |
| Maternal marital status | 1881 | 1827 |
| Maternal age | 1881 | 1839 |
| Maternal parity | 1881 | 1839 |
| Birth weight | 1912 | 1878 |
| Birth length | 1917 | 1878 |
| Head circumference | 1926 | 1880 |
| DLMP‡ | 1912 | 1893 |
| Maternal proteinuria | 1912 | 1893 |
| Placenta weight | — | 1918 |
| Maturity determination | 1912 | 1927 |
↵1-150 Home births = midwife records for home deliveries. †Hospital delivery = midwife records in hospital. ‡DLMP = date of last menstrual period.