Rossi et al reported a calculator for predicting Cesarean delivery for a pregnant woman undergoing labor induction. The authors are from the University of Cincinnati and Cincinnati Children's Hospital.
Patient selection: pregnant woman undergoing labor induction
Outcome: Cesarean delivery
Parameter
Finding
Odds Ratio
Beta-Coefficient (Coefficient Table 1)
prior vaginal delivery
no
yes
0.12
-2.12026 (-2.117)
prior Cesarean delivery
3.5
1.25276 (1.256)
maternal delivery weight in lbs
1.01
0.00995033 (0.011)
maternal height in inches
0.86
-0.1508229 (-0.154)
maternal age
1.06
0.05826891 (0.057)
maternal race
white
1
0
black
1.6
0.47000363
hispanic
1.11
0.10436002
other
1.16
0.14842001
gestational age
32 weeks
33
0.79
-0.2357223
34
0.45
-0.7985077
35
36
0.39
-0.9416085
37
0.32
-1.1394343
38
0.31
-1.171183
39
0.30
-1.2039728
40
0.37
-0.9942523
41
42
0.53
-0.6348783
value of X =
= SUM(points for beta-coefficients and findings) + 6.364
probability of Cesarean delivery =
= 1 / (1 + EXP((-1) * X))
Available at ob.tools/iol-calc
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Specialty: Obstetrics & Gynecology
