| Probability Ratios for Normal Birth | |
---|---|---|
Mean | 95% CI | |
MATERNAL SOCIO-DEMOGRAPHIC CHARACTERISTICS | ||
 Maternal age (+ 5 years)a | 0.84 | 0.74–0.92 |
 Completed secondary education | 1.25 | 0.92–1.70 |
 Identifies as Aboriginal and/or Torres Strait Islander | 0.71 | 0.20–1.29 |
Area of residence | ||
 Major city | 1.00 |  |
 Inner regional | 1.22 | 1.03–1.46 |
 Outer regional | 1.39 | 1.16–1.74 |
 Remote/very remote | 1.19 | 0.77–1.70 |
PREGNANCY DETAILS/COMPLICATIONS | ||
Parity | ||
 Multiparous – no previous CS | 1.00 |  |
 Multiparous – previous CS | 0.10 | 0.03–0.20 |
 Primiparous | 0.22 | 0.09–0.37 |
 Multiple birth | 0.01 | 0.00–0.12 |
Pre-pregnancy BMI (+ 5 kg/m2)b | 0.98 | 0.93–1.05 |
Gestational age (+  1 week)c | 0.90 | 0.83–0.94 |
Gestational diabetes | 0.68 | 0.48–0.91 |
High blood pressure | 0.39 | 0.26–0.53 |
Low lying placenta | 0.76 | 0.55–0.98 |
Other risk factors | 0.81 | 0.70–0.94 |
ANTENATAL AND INTRAPARTUM CARE | ||
Model of care | ||
 Private obstetric care | 1.00 |  |
 Standard public care | 1.77 | 1.46–2.31 |
 GP shared care | 2.00 | 1.64–2.61 |
 Public midwifery continuity care | 2.22 | 1.81–2.83 |
 Private midwifery care | 3.19 | 2.03–4.93 |
Known care providers – labour/birth | ||
 None of them | 1.00 |  |
 Some of them | 0.75 | 0.61–0.88 |
 All of them | 1.26 | 0.93–1.71 |
Continuity of care during labour/birth | 1.24 | 1.09–1.48 |
Felt rushed/hurried during labour | 1.12 | 0.92–1.45 |
LABOUR/BIRTH EXPERIENCE | ||
Augmentation of labour | ||
 Yes | 1.00 |  |
 No | 1.44 | 1.22–1.80 |
 Not sure | 0.96 | 0.51–1.32 |
Had continuous fetal monitoring | 0.34 | 0.24–0.46 |
Freedom of movement throughout labour | 1.33 | 1.11–1.77 |
Water immersion during labour | 1.06 | 0.90–1.26 |
Birth outside business hours | 1.01 | 0.93–1.11 |
Non-supine position during birth | 1.11 | 1.01–1.41 |