Identificação de fatores de risco para o baixo peso ao nascer - uma análise de regressao logística

Abstract

OBJECTIVE: To identify risk factors for low birth weight singleton pregnancies by means of logistic regression analysis with binary outcomes, using data from the Information System on Live Births - SINASC RS in 2008. METHODS: The study population was 131,736 live births after corrections. We used a multiple logistic regression analysis with a significance level of 5%. Data analysis was performed using the computer application PASW 17.0. RESULTS: 8.1% of newborns had low birth weight in RS in 2008. We identified the significant risk factors for low birth weight: nulliparous mothers (OR = 1.41), mothers with maternal age greater than or equal to 35 years (OR = 1.40), mothers with schooling of 0 to 3 years (OR = 1.67) and mothers with schooling 4-11 years (OR = 1.20), mothers who did not have a stable relationship (OR = 1.11), mothers who did not attend any prenatal visits (OR = 3.48), mothers who had 1-6 prenatal visits (OR = 1.74); live births born outside the hospital (OR = 2.05), preterm births (OR = 31.43); females (OR = 1.45) and live births with genetic defects (OR = 2.42). CONCLUSIONS: Prematurity was the main risk factor for the occurrence of low birth weight, followed by the number of prenatal visits showing the importance of having the mother during pregnancy monitoring, quality.