Table 3 Unadjusted and adjusted relationships between package of care and mode of delivery stratified by parity and age group

Model 1: All women

 Vaginal delivery

Reference

Reference

 Elective caesarean

3.5 (3.3–3.6)^a

2.9 (2.8–3.1)^a

 Emergency caesarean

1.2 (1.1–1.3)^a

1.3 (1.2–1.4)^a

Model 2: All Nulliparas

 Vaginal delivery

Reference

Reference

 Elective caesarean

5.8 (5.2–6.4)^a

4.4 (3.9–4.9)^a

 Emergency caesarean

1.3 (1.2–1.5)^a

1.2 (1.0–1.4)^c

 Vaginal delivery

Reference

Reference

 Elective caesarean

4.1 (3.5–4.8)^a

3.8 (3.1–4.6)^a

 Emergency caesarean

1.1 (0.9–1.3)

1.2 (1.0–1.4)^c

 Vaginal delivery

Reference

Reference

 Elective caesarean

5.1 (3.6–7.2)^a

4.9 (3.3–7.3)^a

 Emergency caesarean

1.4 (0.9–1.9)

1.4 (0.9–2.1)

Model 3: All Multiparas

 Vaginal delivery

Reference

Reference

 Elective caesarean

2.9 (1.2–1.4)^a

3.0 (2.8–3.2)^a

 Emergency caesarean

1.2 (1.1–1.3)^a

1.4 (1.3–1.6)^a

 Vaginal delivery

Reference

Reference

 Elective caesarean

2.4 (2.2–2.6)^a

2.7 (2.5–2.9)^a

 Emergency caesarean

0.9 (0.8–1.1)

1.2 (1.0–1.4)^c

 Vaginal delivery

Reference

Reference

 Elective caesarean

2.7 (2.3–3.2)^a

2.9 (2.4–3.6)^a

 Emergency caesarean

1.0 (0.8–1.3)

1.2 (0.9–1.8)