Sultan et al reported a model for predicting venous thromboembolism in a woman in the postpartum period. The authors are from multiple institutions in England and Sweden.
Parameters:
(1) smoker
(2) varicose veins
(3) comorbidities (cardiac, renal, inflammatory bowel disease)
(4) preclampsia or eclampsia
(5) diabetes
(6) postpartum hemorrhage
(7) stillbirth
(8) postpartum infection
(9) Cesarean section
(10) parity
(11) age at delivery in years
(12) body mass index in kg per square meter
(13) infant birth weight in grams
Parameter
Finding
Points
smoker
no
0
yes
0.227
varicose veins
1.221
comorbidities
0.848
preeclampsia or eclampsia
0.721
diabetes
0.421
postpartum hemorrhage
0.502
stillbirth
1.151
postpartum infection
1.097
Cesarean section
elective
0.563
emergence
0.750
parity
1
0.165
2
0.481
>= 3
0.566
age
-(0.0000798 * ((age)^3)) + (0.0000214 * ((age)^3) * LN(age))
BMI
(0.00026641 * ((BMI)^3)) − (0.0000650* ((BMI)^3) *LN(BMI))
birth weight
−(22156315 / ((weight)^2)) + (3455223.4 * LN(weight) / ((weight)^2))
value of X =
= SUM(points for all of the parameters)
risk score =
= (0.94 * X) - 9.103
probability of venous thromboembolism within the first 6 weeks after delivery =
= 1 / (1 + EXP((-1) * (risk score)))
To read more or access our algorithms and calculators, please log in or register.
Specialty: Hematology Oncology
