Mailath-Pokorny et al developed models for predicting risk of preterm birth. One model predicts the risk of delivery within the next 48 hours. The authors are from the Medical University of Vienna and Karl Landsteiner Institute for General Gynecology and Experimental Gynecologic Oncology.
Parameters:
(1) preterm premature rupture of the membranes (PPROM)
(2) cervical length in mm
(3) serum C-reactive protein (CRP) in mg/dL
Parameter
Finding
Points
preterm PROM
no
0
yes
28.3
Cervical Length
Points
0 to 20 mm
(0.04943 * ((mm)^2)) - (3.375 * (mm)) + 60.11
20 to 55 mm
(0.006788 * ((mm)^2)) - (0.8518 * (mm)) + 26.42
CRP
Points
< 0.02
0
0.02 to 0.06
(-3024 * ((CRP)^2)) + (679.8 * (mm)) - 10.85
0.06 to 0.5
(-140.3 * ((CRP^2)) + (138.4 * (CRP)) + 11.26
0.5 to 4
(-2.229 * ((CRP)^2)) + (17.58 * (CRP)) + 37.96
4 to 32
(-0.03273 * ((CRP)^2)) + (2.121 * (CRP)) + 65.53
> 32
100
total score =
= SUM(points for all 3 parameters)
Interpretation:
• The higher the score the greater the risk of delivery within the next 48 hours.
