Abstract
Objective: To relate socioeconomic characteristics, smoking, alcohol use, and sexual behavior among primiparous, primiparous, and nulliparous adolescents. Methods: Controlled, analytical cross-sectional design, performed in basic units, Teresina-PI. Sampling of 105 adolescents, 35 per group. Used form to collect data with socioeconomic variables, smoking, sexual behavior and Alcohol Use Disorder Identification Test to identify alcohol consumption. Results: Mean age (p = 0.005) between 16-17 years, and education (p = 0.007), 10-12 years of study. Primiparous and primiparous women had higher frequencies of living with partner (p <0.001), higher percentage without occupation, lower number of students (p = 0.003), higher frequency of mothers with low education (p = 0.022), belonging to the economic strata C, D or E, (p = 0.009). Primiparous women had higher frequencies of smokers or former smokers, harmful use of alcohol, no use of condoms at first intercourse and relationship in the last 12 months (p = 0.014), but with higher condom use (p = 0.126). Conclusion: Primiparous and primiparous women presented more unfavorable socioeconomic conditions. The primigravida and nulligravida, less exposure to the use of tobacco and alcohol. Higher frequency of protection at first intercourse yet characterizing greater health risk for both mother and baby.