52 Chapter 2 Supplementary tables Additional file 1. Table 4. Crude and adjusted* ORs of childbirth interventions by region, compared to the weighted mean, with 99% CIs GR FR DR OV FL Total n 19,441 22,568 15,875 42,869 17,461 Induction of labour Crude OR [99% CI] aOR* [99% CI] 1.20 [1.16-1.25] 1.18 [1.13-1.23] 0.92 [0.89-0.96] 0.90 [0.86-0.94] 1.30 [1.25-1.36] 1.29 [1.23-1.35] 1.03 [1.001-1.06] 1.01 [0.98-1.04] 1.04 [0.99-1.08] 1.09 [1.04-1.15] Augmentation of labour after spontaneous onset Crude OR [99% CI] aOR* [99% CI] 0.94 [0.90-0.99] 0.95 [0.90-0.996] 0.85 [0.81-0.89] 0.92 [0.88-0.97] 1.02 [0.97-1.07] 1.10 [1.04-1.17] 0.79 [0.76-0.81] 0.80 [0.77-0.83] 1.31 [1.25-1.37] 1.30 [1.24-1.37] Intrapartum oxytocin use Crude OR [99% CI] aOR* [99% CI] 1.05 [1.01-1.10] 1.06 [1.01-1.10] 1.03 [0.99-1.08] 1.05 [1.01-1.10] 1.16 [1.11-1.21] 1.19 [1.13-1.25] 0.92 [0.89-0.95] 0.92 [0.89-0.95] 1.22 [1.17-1.28] 1.24 [1.19-1.30] Epidural (women without prelabour CS) Crude OR [99% CI] aOR* [99% CI] 1.08 [1.03-1.14] 1.08 [1.03-1.14] 0.79 [0.75-0.83] 0.84 [0.80-0.89] 0.48 [0.44-0.51] 0.50 [0.46-0.54] 1.09 [1.06-1.13] 1.15 [1.11-1.19] 0.52 [0.49-0.56] 0.48 [0.45-0.52] Other pharmacological pain relief (women without prelabour CS) Crude OR [99% CI] aOR* [99% CI] 0.82 [0.79-0.87] 0.82 [0.78-0.86] 0.89 [0.86-0.93] 0.93 [0.89-0.97] 1.81 [1.73-1.89] 1.87 [1.78-1.95] 0.69 [0.66-0.71] 0.69 [0.67-0.72] 2.19 [2.11-2.28] 2.14 [2.05-2.23] Spontaneous vaginal birth Crude OR [99% CI] aOR* [99% CI] 0.90 [0.87-0.94] 0.89 [0.85-0.93] 0.96 [0.92-0.995] 0.90 [0.87-0.94] 1.04 [0.996-1.09] 1.00 [0.95-1.05] 0.99 [0.97-1.02] 0.97 [0.94-0.999] 1.06 [1.01-1.11] 1.03 [0.98-1.08] Instrumental vaginal birth (women without prelabour CS) Crude OR [99% CI] aOR* [99% CI] 1.11 [1.05-1.18] 1.11 [1.05-1.18] 1.00 [0.95-1.06] 1.07 [1.004-1.13] 0.96 [0.90-1.03] 1.00 [0.93-1.07] 1.09 [1.04-1.13] 1.14 [1.09-1.19] 0.97 [0.91-1.03] 1.03 [0.96-1.11] Caesarean Section Crude OR [99% CI] aOR* [99% CI] 1.08 [1.03-1.13] 1.10 [1.05-1.15] 1.06 [1.02-1.11] 1.11 [1.06-1.16] 0.97 [0.92-1.02] 1.01 [0.95-1.07] 0.95 [0.92-0.99] 0.96 [0.93-0.998] 0.94 [0.89-0.99] 0.94 [0.89-0.995]
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