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Table 8 Illustration of the stepwise replacement procedure and contributions of progression proportions to the overall decline (between BCM and ACM groups) of: (i) the crude treatment ratio H, (ii) the treatment ratio for caesarean section, HC, and (iii) the treatment ratio for operative delivery, HVC. The values of H, HC, HVC are based on Form 5 in Table 4

From: General methods for measuring and comparing medical interventions in childbirth: a framework

 

Cohort 1 (BCM)

Replace

pOA

& replace

pOV

& replace

pOC

& replace

pAV

& replace

pAC

& replace

pVC

Cohort 2

(ACM)

pOA

0,338

0,231

0,231

0,231

0,231

0,231

0,231

0,231 (−31.7%)

pOV

0,016

0,016

0,028

0,028

0,028

0,028

0,028

0,028 (+ 76%)

pOC

0,039

0,039

0,039

0,037

0,037

0,037

0,037

0,037 (− 5.5%)

pAV

0,079

0,079

0,079

0,079

0,088

0,088

0,088

0,088 (+ 11.7%)

pAC

0,177

0,177

0,177

0,177

0,177

0,139

0,139

0,139 (−21.5%)

pVC

0,074

0,074

0,074

0,074

0,074

0,074

0,045

0,045 (−38.6%)

H

0,482

0,347

0,360

0,358

0,360

0,351

0,350

0,350

\( {H}_{i+1}^{\ast }-{H}_i^{\ast } \)

 

−0,135

0,013

−0,002

0,002

−0,009

−0,001

 

Relative contributions to observed difference H2 − H1

 

−100,00

9,50

−1,60

1,70

−6,48

−1,02

 

HC

0,102

0,083

0,083

0,081

0,081

0,073

0,071

 

\( {H}_{C,i+1}^{\ast }-{H}_{C,i}^{\ast } \)

 

−0,020

0,001

−0,002

0,000

−0,009

−0,001

 

Relative contributions to observed difference

 

−100,0

4,5

− 11,0

0,8

−44,8

−7,0

 

HV + HC

0,144

0,116

0,129

0,127

0,129

0,121

0,119

 

\( {H}_{V,C,i+1}^{\ast }-{H}_{V,C,i}^{\ast } \)

 

−0,028

0,013

−0,002

0,002

−0,009

−0,001

 

Relative contributions to observed difference

 

−100,0

45,8

−7,7

8,2

−31,3

−4,9

Â