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| Patient Demographics | ||||
| Overall | Male Cohort | Female Cohort | p = | |
| Number of Patients | 388 | 212 | 176 | n/a |
| Maternal Age | 32 (20–47) | 32 | 32 | 0.45 |
| BMI | 24 (17–42) | 24 | 25 | 0.12 |
| % Primiparous | 65% (251/388) | 64% (136/212) | 65% (115/176) | 0.86 |
| Ethnicity (%) | ||||
| Caucasian | 67% (260/388) | 68% (144/212) | 66% (116/176) | 0.84 |
| Asian | 17% (66/388) | 19% (40/212) | 15% (26/176) | 0.31 |
| Afro-Caribbean | 10% (38/388) | 10% (21/212) | 10% (17/176) | 1 |
| Other | 6% (23/388) | 3% (6/212) | 10%(17/176) | 0.002 |
