Introduction:

there are many factors associated to a bigger risk for newborns with low weight at birth.

Objective:

to apply and to validate a prognostic index for the risk stratification in newborns with low weight at birth.

Materials and methods:

a cohort or prospective, longitudinal, observational study was carried out in pregnant women attending the health area of Guanabacoa municipality in the period from January 1st 2016 until December 31st 2019 to apply a prognostic index of low weight at birth, with clinical elements. Through the appreciated logistic regression function the possibilities of low weight at birth were calculated in the estimation sample, and that empiric distribution was fragmented in tertils to scrutinize zones allowing classifying pregnant women as low, medium and high risk of low weight births.

Results:

85.7% of the pregnant women showed low probability of low birth weight. 60.4% of them was classified as patient with a high probability of low birth weight, and most of the patients classified as of medium risk of low birth weight; 11 patients were not adequately classified by the prognostic index.

Conclusions:

the conformed index showed suitable efficacy and reliability, being useful to carry out prognosis of low weight at birth in pregnant women of the health area.

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