Gestational age at delivery (weeks) Total excess risk ratio (95% CI) Controlled direct effect Excess risk ratio (95% CI) Attributed to mediation Percent (95% CI) Due to interaction
Percent (95% CI)
Caesarean delivery without trial of labour Caesarean delivery without trial of labour Caesarean delivery without trial of labour Caesarean delivery without trial of labour Caesarean delivery without trial of labour
22-33* 43.5 (39.6, 47.4) 89.4 (86.7, 91.9) -17.3 (-21.5, -14.0) 11.5 (9.1, 14.3)
34-36 53.5 (49.7, 57.6) 73.1 (69.7, 76.1) 3.2 (2.5, 4.1) 26.7 (23.7, 30.1)
37-38 53.3 (49.9, 56.3) 78.9 (74.3, 83.2) 3.2 (2.3, 4.2) 23.2 (18.7, 27.9)
39-40 0.0 (Reference) 0.0 (Reference) 0.0 (Reference) 0.0 (Reference)
≥41 35.0 (31.5, 38.5) 101.8 (98.1, 106.8) -8.7 (-10.6, -7.0) 5.0 (0.6, 8.6)
Caesarean delivery with trial of labour Caesarean delivery with trial of labour Caesarean delivery with trial of labour Caesarean delivery with trial of labour Caesarean delivery with trial of labour
22-33* 78.6 (67.7, 90.9) 10.7 (7.6, 14.2) 1.3 (-3.3, 5.7) 89.1 (85.7, 92.2)
34-36 37.8 (34.0, 41.4) 24.1 (17.8, 29.3) 22.5 (20.4, 24.7) 70.4 (65.3, 76.3)
37-38 24.3 (21.9, 26.7) 41.1 (32.0, 50.1) 13.9 (11.8, 16.2) 59.5 (50.5, 68.6)
39-40 0.0 (Reference) 0.0 (Reference) 0.0 (Reference) 0.0 (Reference)
≥41 10.5 (7.4, 13.3) 79.9 (69.0, 86.2) 9.9 (7.3, 14.1) 7.4 (2.9, 14.3)