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A Population Based Study on Very Low Birth Weight, Based on the 2004 Birth Cohort of Florida
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> Calculator
The calculator is based on fitted log-linear model, which is built by SAS software. Only significant factors in the model are included in the calculator. The calculator will calculate the probability and odds of the outcome.
Probability & Odds Calculator for Very Low Birth Weight in 2004
Pregnancy Interval :
<=15 mo
NA
>15 mo
Medicaid:
Obese
Overweight
Normal(<=25)
Sex of Baby :
Male
Female
Mother's Education :
<HS
HS
>HS
Adequate prenatal care? :
No
Yes
Medicaid:
Yes
No
Mother's Race :
Black
Other
White
Marital Status, married? :
No
Yes
Age of Mom :
<20
>34
20-34
Prev preg experience :
1-2
>2
Fail
0
Plurality :
MultiBirth
Singleton
Prenatal screen score :
High
None
Low
Smoking :
Yes
No
Had WIC>=1 day during preg? :
Yes
No
Statistical Model Formula for Predicted Rates
Show/Hide
linear predictor (lp) =
-5.147233283 -(BI==1)*0.0202203145 +(BI==2)*0.1939612888 +(BMI==1)*0.3787228345 +(BMI==2)*0.0639102761 -(bsex==1)*0.0360883302 +(edu==1)*0.0172678312 +(edu==2)*0.1577985551 -(kotel==1)*0.8677077995 +(med==1)*0.49208875 +(mrace==1)*1.4014650669 +(mrace==2)*0.4220426 +(ms==1)*0.380197379 -(omomage==1)*0.0390803413 +(omomage==2)*0.4072322635 -(pexp==1)*0.2269572881 -(pexp==2)*0.2631842837 +(pexp==3)*0.861656935 +(plural==1)*2.5838989571 -(pnss==1)*0.0098357401 +(pnss==2)*0.0294035329 +(smoking==1)*0.0739465013 -(wic==1)*0.3572907965 -(med==1)*(mrace==1)*0.5342955382 -(med==1)*(mrace==2)*0.2929267361 +(kotel==1)*(pnss==1)*0.4731950014 +(kotel==1)*(pnss==2)*0.9733518603 -(mrace==1)*(plural==1)*0.3961661437 -(mrace==2)*(plural==1)*0.1908690064 -(BMI==1)*(pexp==1)*0.4141683346 -(BMI==1)*(pexp==2)*0.5650118135 -(BMI==1)*(pexp==3)*0.4709995047 -(BMI==2)*(pexp==1)*0.1326402098 -(BMI==2)*(pexp==2)*0.3061193076 -(BMI==2)*(pexp==3)*0.4191578275 -(kotel==1)*(wic==1)*0.4880502996 +(kotel==1)*(smoking==1)*0.5906427474 -(ms==1)*(wic==1)*0.2761073205 -(med==1)*(plural==1)*0.2862759069 -(BI==1)*(edu==1)*0.0484170774 +(BI==1)*(edu==2)*0.1324042107 +(BI==2)*(edu==1)*0.2620767204 -(BI==2)*(edu==2)*0.0329049791 +(bsex==1)*(omomage==1)*0.0968432411 -(bsex==1)*(omomage==2)*0.2605074871.
probability =
Exp (lp)
Odds =
probability / (1 - probability).
Please report problems to
MCHERDC
Last update made July, 2008.