Risk Score of Pastore et al for Antenatal Bacterial Vaginosis (BV PIN)

Description

Pastore et al developed 2 models (full and reduced) for predicting antenatal bacterial vaginosis (BV). The reduced model can help to identify a pregnant woman who should be tested for bacterial vaginosis. The authors are from the University of North Carolina.

Patient selection: pregnant woman from 24 to 29 weeks of gestation

Parameters for the reduced score:

(1) vaginal fluid pH

(2) antenatal diagnosis of bacterial vaginosis or test

(3) history of sexually-transmitted disease (STD)

(4) race

(5) condom use during pregnancy

(6) sperm in vaginal smear (often due to use of a spermicide, page 129)

Parameter	Finding	Points
vaginal fluid pH	high (> 4.5)	5
	not high	0
antenatal diagnosis BV	no	0
	yes	1
history of STD	no	1
	yes	0
race	black	1
	other	0
condom use	no	0
	yes	1
sperm in vaginal smear	no	1
	yes	0

where:

• A previous diagnosis of BV might be weighted higher.

total score =

= SUM(points for all 6 parameters)

Interpretation:

• minimum score: 0

• maximum score: 10

• A woman with a score >= 4 would have testing (Gram stain) for bacterial vaginosis done.

Performance:

• The area under the ROC curve was 0.81.

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Risk Score of Pastore et al for Antenatal Bacterial Vaginosis (BV PIN)

Description

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