|  | Rate of intrapartum referrals among nulliparous women in midwifery practices (tertiles) | ||||
---|---|---|---|---|---|---|
T1 (low) | T2 | T3 (high) | Total | Â | ||
Nulliparous women |  | n = 35,180 | n = 40,021 | n = 37,605 | n = 112,806 | χ2p-value |
Maternal age | <25 | 21.1 | 19.3 | 18.9 | 19.7 | <0.001 |
 | 25-34 | 69.2 | 70.7 | 70.9 | 70.3 |  |
 | ≥35 | 9.7 | 10.0 | 10.3 | 10.0 |  |
Gestational age | 37-41 + 0 | 82.8 | 82.9 | 83.2 | 82.9 | 0.025 |
 | >41 + 0 | 17.2 | 17.1 | 16.8 | 17.1 |  |
Background | Dutch | 80.8 | 84.9 | 82.3 | 82.8 | <0.001 |
 | Not Dutch | 19.2 | 15.1 | 17.7 | 17.2 |  |
SES | Cat 1 (high) | 21.2 | 23.2 | 23.0 | 22.5 | <0.001 |
(Social economic status) | Cat 2 | 45.7 | 44.3 | 43.6 | 44.5 | Â |
 | Cat 3 (low) | 33.1 | 32.5 | 33.4 | 33.0 |  |
Urbanization | Very urban | 25.0 | 21.9 | 19.6 | 22.1 | <0.001 |
 | Intermediate | 51.4 | 60.1 | 63.4 | 58.5 |  |
 | Rural | 23.6 | 18.0 | 16.9 | 19.4 |  |
Planned place of birth | Home | 44.4 | 42.6 | 39.9 | 42.2 | <0.001 |
 | Hospital | 44.9 | 48.8 | 51.6 | 48.5 |  |
 | Other/unknown | 10.6 | 8.7 | 8.6 | 9.2 |  |
Multiparous women |  | n = 41,273 | n = 46,158 | n = 42,708 | n = 130,139 |  |
 |  | % | % | % | % |  |
Maternal age | <25 | 6.2 | 5.8 | 5.6 | 5.9 | <0.001 |
 | 25-34 | 68.7 | 68.2 | 68.8 | 68.6 |  |
 | ≥35 | 25.1 | 26.0 | 25.5 | 25.6 |  |
Gestational age | 37-41 + 0 | 83.9 | 83.5 | 84.2 | 83.9 | 0.001 |
 | >41 + 0 | 16.1 | 16.5 | 15.8 | 16.1 |  |
Background | Dutch | 80.3 | 82.6 | 78.9 | 80.6 | <0.001 |
 | Not Dutch | 19.7 | 17.4 | 21.1 | 19.4 |  |
SES | Cat 1 (high) | 22.6 | 25.4 | 25.1 | 24.4 | <0.001 |
 | Cat 2 | 47.9 | 45.7 | 44.6 | 46.0 |  |
 | Cat 3 (low) | 29.4 | 28.9 | 30.4 | 29.5 |  |
Urbanization | Very urban | 19.3 | 16.3 | 14.9 | 16.8 | <0.001 |
 | Intermediate | 52.9 | 62.6 | 65.7 | 60.5 |  |
 | Rural | 27.9 | 21.1 | 19.3 | 22.7 |  |
Planned place of birth | Home | 52.0 | 50.1 | 46.9 | 49.6 | <0.001 |
 | Hospital | 37.4 | 41.3 | 44.4 | 41.1 |  |
 | Other/unknown | 10.6 | 8.6 | 8.8 | 9.3 |  |