Ethnic differences in factors associated with the use of contraception among 20- to 44-year-old women in Estonia and St. Petersburg, Russia.

Background: The aim of this study was to explore factors associated with contraception among 20- to 44-year-old women in different ethnic groups in two Eastern European countries.

Study Design: Data on sexually experienced women in need of contraception taken from population-based cross-sectional surveys, conducted in Estonia (n=1680) and in St. Petersburg (n=798), were analyzed. Factors associated with contraception nonuse or the use of unreliable contraceptive methods were explored using multivariate logistic regression analysis.

Results: The age-standardized prevalence rate of contraception nonuse or the use of unreliable contraceptive methods was high (27.3% among Estonian-speaking women in Estonia, 39.9% and 42.5% among Russian-speaking women in Estonia and in St. Petersburg, respectively). Age, economic subsistence, high-risk sexual behavior and smoking did not correlate with contraception nonuse or the use of unreliable contraceptive methods among Russian-speaking women in Estonia and in St. Petersburg; this was in contrast to Estonian-speaking women in Estonia. Previous childbirth and abortion reduced the risk of contraception nonuse or the use of unreliable contraceptive methods among Estonian-speaking women in Estonia (adjusted odds ratio, 0.50; 95% confidence interval [CI], 0.31-0.81) but elevated the risk among Russian-speaking women in St. Petersburg (1.99; 1.17-3.40). Abortion, not previous childbirth, was associated with an increased risk among Russian-speaking women in Estonia (2.94; 1.25-6.95).

Conclusions: The importance of different risk factors associated with contraceptive use varies between different ethnic groups. Cross-national comparisons are essential for the design of public health policies that decrease the burden of sexual ill health.