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Comparison of women included in the Akershus Birth Cohort and all women who gave birth in Norway in 2010
| The Akershus Birth Cohort Study | All woman who gave birth in Norway in 2010 | |
|---|---|---|
| Mean maternal age | 31.3 years | 30.2 years |
| First time mothers | 48.9 % | 42.6 % |
| Smoking during pregnancy | 6.6 % | 7.2 % |
| Single women | 1.1 % | 9.1 % |
| Elective caesarean section | 5.0 % | 6.5 % |
