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Overview :
Odibo et al developed a score for predicting preterm delivery
at < 32 weeks gestation in women who have had cervical cerclage. This can
help identify a patient who may benefit from closer monitoring and more
aggressive management. The authors are from the University of Pennsylvania and
Thomas Jefferson University Hospital in Philadelphia.
Parameters:
(1) cervical length
(2) history of cervical cone biopsy
(3) timing for the cervical cerclage
|
Parameter |
Finding |
Points |
|
cervical length |
>= 25 mm |
0 |
|
|
< 25 mm |
1 |
|
history of cervical cone biopsy |
no |
0 |
|
|
yes |
1 |
|
timing of the cervical cerclage |
non-emergency |
0 |
|
|
emergency |
1 |
total score =
= SUM(points for all 3 parameters)
Interpretation:
• minimum score: 0
• maximum score: 3
• A score >= 2 was predictive of preterm delivery.
Performance:
• Sensitivity 80%, specificity 96%, Youden index 76%.
• Negative predictive value 95%, accuracy 93%.
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