The determinants of sexually transmitted infections among reproductive age women in St. Petersburg, Estonia and Finland.

OBJECTIVES: Sexually transmitted infections' (STIs) rate vary in St. Petersburg, Estonia and Finland; the aim was to compare the determinants of self-reported sexually transmitted infections in these areas. METHODS: Data from four population-based questionnaire surveys were used (Finland in 1992 and 1999; St. Petersburg in 2003; Estonia in 2004). With the exception of the 1992 Finnish survey (interview) all were postal surveys, with 1,070 respondents in Finland (78 and 52% response rates), 1,147 (68%) in St. Petersburg, and 5,190 (54%) in Estonia. RESULTS: Risky sexual behaviours were equally common in the three areas and the determinants were the same. Women with an STIs history more often had had their first sexual intercourse when aged under 18, had not used condom during first intercourse, had a high number of lifetime or previous year sexual partners. However, marital status and education were not similar determinants. Cohabiting and well-educated women in Finland were more likely to have STIs while in other areas the associations found were not statistically significant. CONCLUSIONS: Risky behaviour predicts STIs, but does not explain the varying rates of STIs between areas.

Risk factors for induced abortions in St Petersburg, Estonia and Finland. Results from surveys among women of reproductive age.

OBJECTIVES: To compare the risk factors of self-reported abortion in St Petersburg, Estonia and Finland, which are neighbouring areas having different abortion rates. METHODS: Data from four population-based questionnaire surveys (Finland 1992 and 1999; St Petersburg 2003; Estonia 2004) were used. With the exception of the 1992 Finnish survey (based on interviews) all were postal surveys. There were 1070 respondents in Finland (78% and 52% response rates), 1147 (68%) in St Petersburg, and 5190 (54%) in Estonia. RESULTS: The prevalence of self-reported abortions was highest among women in St Petersburg and among the two oldest age groups of Russian-speaking Estonians. In all areas women with a history of abortion were more likely to have low education, children, a history of multiple partners and to have had their first intercourse when younger than 18 years. Insufficient use of reliable contraception, both at first and last intercourse, was the only risk factor that was more common in St Petersburg and in Estonia than in Finland. In Estonia, more Estonian than Russian-speaking women used reliable contraceptives. CONCLUSION: The comparison of three areas suggests that high abortion rates are related to low contraceptive use and not to other risky sexual behaviour.