42 Chapter 2 Figure 7a. Regional variation of intrapartum CS and instrumental birth for women in midwife-led care The reference category (OR of 1.0) is the weighted overall rate of the country. ρ (rho) is the coefficient between the two point markers in the figure (intrapartum CS and instrumental birth), which corresponds with the correlation described in table 6. Figure 7b. Regional variation of intrapartum CS and instrumental birth for women in obstetrician-led care The reference category (OR of 1.0) is the weighted overall rate of the country. ρ (rho) is the coefficient between the two point markers in the figure (intrapartum CS and instrumental birth), which corresponds with the correlation described in table 6.
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