{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,23]],"date-time":"2025-12-23T18:58:39Z","timestamp":1766516319002,"version":"3.48.0"},"reference-count":29,"publisher":"BMJ","issue":"6861","license":[{"start":{"date-parts":[[1992,10,31]],"date-time":"1992-10-31T00:00:00Z","timestamp":720489600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.bmj.com\/company\/legal-information\/terms-conditions\/legal-information\/tdm-licencepolicy"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMJ"],"published-print":{"date-parts":[[1992,10,31]]},"abstract":"<jats:p>OBJECTIVES--To study use of oral contraceptives among Finnish teenagers during 1981-91 and how abortions, childbirths, sexually transmitted diseases, and cardiovascular diseases changed during this period. DESIGN--Biannual cross sectional surveys with mailed questionnaires from 1981 onwards and analysis of national statistics. SETTING--Finland. SUBJECTS--A nationwide sample of 14, 16, and 18 year olds. Sample size varied from 1249 to 3887 and response rate from 85% to 94%. MAIN OUTCOME MEASURES--Proportion taking oral contraceptive, fertility and abortion rates, hospital discharge rates, rates of sexually transmitted diseases. RESULTS--The proportion of teenagers taking oral contraceptives increased steadily. In 1991 the percentages among 14, 16, and 18 year olds were 2%, 18%, and 41% compared with 0.2%, 7% and 22% in 1981. Most users had a steady partner (80% of 16 year olds and 85% of 18 year olds). By 1989 rates of abortion had fallen from 12\/1000 to 9.3\/1000 in 16 year olds and from 25\/1000 to 19.2\/1000 in 18 year olds; fertility rates had fallen from 4.5\/1000 to 2.3\/1000 and from 23.5\/1000 to 15.3\/1000 respectively. Rates in 14 year olds fell only slightly. Gonorrhoea infection fell and HIV infection remained rare. Rates of hospital discharge after thromboembolic venous disease rose slightly. CONCLUSIONS--The increased use of oral contraceptives is the most likely explanation for decreasing abortion and fertility rates among teenagers. Increased reliance on the condom because of the threat of AIDS may increase unwanted pregnancies.<\/jats:p>","DOI":"10.1136\/bmj.305.6861.1053","type":"journal-article","created":{"date-parts":[[2009,3,30]],"date-time":"2009-03-30T08:16:37Z","timestamp":1238400997000},"page":"1053-1057","source":"Crossref","is-referenced-by-count":23,"title":["Use of oral contraceptives by adolescents and its consequences in Finland 1981-91."],"prefix":"10.1136","volume":"305","author":[{"given":"A. H.","family":"Rimpel\u00e4","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. K.","family":"Rimpel\u00e4","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E. A.","family":"Kosunen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1992,10,31]]},"reference":[{"key":"ref_1","first-page":"527","article-title":"Promoting healthy behavior in adolescence: the case of sexualitx anid pregnanc\\","volume":"76","author":"Brooks-Gunn, J.; Paikoff, R.","year":"1991","unstructured":"Brooks-Gunn J, Paikoff R. Promoting healthy behavior in adolescence: the case of sexualitx anid pregnanc\\. Buill NYAcad Med 1991;76:527-47.","journal-title":"Buill NYAcad Med"},{"key":"ref_2","first-page":"337","article-title":"Adolescent contraception. Review and recommendations","volume":"22","author":"Turetsky, R.A.; Strasburger, V.C.","year":"1983","unstructured":"Turetsky RA, Strasburger VC. Adolescent contraception. Review and recommendations. C\/itt Pediatr 1983;22:337-41.","journal-title":"C\/itt Pediatr"},{"key":"ref_3","first-page":"2692","article-title":"Health consequences of contraceptive use and reproductive pattems. Summary of a report from the US National Research Council","volume":"265","author":"DaVanzo, J.; Pamell, A.M.; Foege, W.H.","year":"1991","unstructured":"DaVanzo J, Pamell AM, Foege WH. Health consequences of contraceptive use and reproductive pattems. Summary of a report from the US National Research Council. JA,VIA 1991;265:2692-6."},{"key":"ref_4","first-page":"1181","article-title":"Immunodeficiency in female sexual partners of men svith the acquired immunodeficiencv syndrome","volume":"308","author":"Harris, C.; Small, C.B.; Klein, R.E.; Friedland, G.H.; Small, C.B.; Emeson, E.E.","year":"1983","unstructured":"Harris C, Small CB, Klein RE, Friedland GH, Small CB, Emeson EE, et al. Immunodeficiency in female sexual partners of men svith the acquired immunodeficiencv syndrome. NEPtgljMed 1983;308:1181.","journal-title":"NEPtgljMed"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1093\/her\/7.1.69","article-title":"Sexual knowledge, attitudes, fears and behaviors of adolescents in Finland (the KISS study)","volume":"7","author":"Kontula 0, Rimpe1l M, Ojanlatva A","year":"1992","unstructured":"Kontula 0, Rimpe1l M, Ojanlatva A. Sexual knowledge, attitudes, fears and behaviors of adolescents in Finland (the KISS study). Health Educatilo Research 1992;7:69-77.","journal-title":"Health Educatilo Research"},{"key":"ref_6","first-page":"2","article-title":"An epidemiologic survey of cardiovascular disease in women taking oral contraceptises","volume":"163","author":"Thorogood, M.; Vessey, M.","year":"1990","unstructured":"Thorogood M, Vessey M. An epidemiologic survey of cardiovascular disease in women taking oral contraceptises. Ant J Obstet Gypnecol 1990;163(Pt 2): 274-81.","journal-title":"Ant J Obstet Gypnecol"},{"key":"ref_7","article-title":"The evolution of the juvenile health habit study 1977-85","volume-title":"Health belhaviour research attd health pronsiotios","author":"Anderson, R.","year":"1988","unstructured":"Rimpela M, Rimpela A, Rahkonen 0, Teperi J. The evolution of the juvenile health habit study 1977-85. In: Anderson R, Davies JK, Kickbush I, McQueen D\\, eds. Health belhaviour research attd health pronsiotios. Oxford: Oxford University Press, 1988."},{"key":"ref_8","article-title":"Sukupuolieibnlant aloittawnisent Yltteiskumtstallisista ehdoista","author":"0, Kontula","year":"1991","unstructured":"Kontula 0. Sukupuolieibnlant aloittawnisent Yltteiskumtstallisista ehdoista. Helsinki: VAPK-kustannus, 1991."},{"issue":"6","key":"ref_9","first-page":"145","article-title":"Structure of population and vital statistics 1980-6","volume":"1980","author":"Central Statistical Office of Finland","unstructured":"Central Statistical Office of Finland. Structure of population and vital statistics 1980-6. Official Statistics of Fittland II'A 1980-6:145-53.","journal-title":"Official Statistics of Fittland II'A"},{"issue":"1","key":"ref_10","first-page":"7","article-title":"Structure of population and vital statistics 1987-8","volume":"1990","author":"Central Statistical Office of Finland","unstructured":"Central Statistical Office of Finland. Structure of population and vital statistics 1987-8. Official Statistics of Fitl\/asid, Popuilatiot 1990-1:7.","journal-title":"Official Statistics of Fitl\/asid, Popuilatiot"},{"key":"ref_11","article-title":"Health in Finland. Health Sernices 1981","volume":"77","author":"National Board of","unstructured":"National Board of Health in Finland. Health Sernices 1981. Official Statistics of Finland XI:77.","journal-title":"Official Statistics of Finland XI"},{"key":"ref_12","first-page":"22","article-title":"Health in Finland. Health services 1987","volume":"3","author":"National Board of","year":"1989","unstructured":"National Board of Health in Finland. Health services 1987. Official Statistics of Fintlastd 1989;3:22.","journal-title":"Official Statistics of Fintlastd"},{"article-title":"Causes of death in Finland 1980-6","author":"Central Statistical Office of Finland","key":"ref_13","unstructured":"Central Statistical Office of Finland. Causes of death in Finland 1980-6."},{"issue":"89","key":"ref_14","first-page":"4","article-title":"Causes of death in Finland 1987-9","volume":"1987","author":"Central Statistical Office of Finland","unstructured":"Central Statistical Office of Finland. Causes of death in Finland 1987-9. Official Statistics ofFinlattd, Healtlt, 1987-89;4-6.","journal-title":"Official Statistics ofFinlattd, Healtlt"},{"key":"ref_15","article-title":"Statistical niiethods it mizedical rescarch","author":"Armitage, P.","year":"1971","unstructured":"Armitage P. Statistical niiethods it mizedical rescarch. Oxford: Blackwell Scientific, 1971."},{"key":"ref_16","first-page":"32","article-title":"Different contraceptive practices: Use of contraceptives in Finland and other Nordic countries in the 1970s and 1980s","volume":"19","author":"Makkonen, K.; Hemminki, E.","year":"1991","unstructured":"Makkonen K, Hemminki E. Different contraceptive practices: Use of contraceptives in Finland and other Nordic countries in the 1970s and 1980s. ScapidjSocMed 1991;19:32-8.","journal-title":"ScapidjSocMed"},{"key":"ref_17","unstructured":"Nordic Medico-Statistical Committee. Health Statistics iti thle Nordic Counptries 1966-1991. Copenhagen: NOMESCO 1991:36.","article-title":"Nordic Medico-Statistical Committee. Health Statistics iti thle Nordic Counptries 1966-1991"},{"key":"ref_18","article-title":"Adolescessi isaturatioss tos courtship anld sexualits'","author":"Kontula 0, Merilainen J","year":"1988","unstructured":"Kontula 0, Merilainen J. Adolescessi isaturatioss tos courtship anld sexualits'. Helsinki: National Board of Health, 1988. (Health education series original reports 9\/1988.) (In Finnish, English summarv)."},{"key":"ref_19","article-title":"Teenage abortiniss, finilt backgrowid, sexual.xprite.m an, d coWrvaceptiVe lise","author":"Ruusuvaara, L.","year":"1983","unstructured":"Ruusuvaara L.. Teenage abortiniss, finilt backgrowid, sexual.xprite.m an,d coWrvaceptiVe lise. [dissertation]. Helsinki: Universitv of Helsinki, 1983."},{"key":"ref_20","first-page":"46","article-title":"Stigande aborttal Sverige. Dags f6Ir sexologispecialitet? W\\o,.rd ifed","volume":"105","author":"Holmgren, K.","year":"1990","unstructured":"Holmgren K. Stigande aborttal Sverige. Dags f6Ir sexologispecialitet? W\\o,.rd ifed 1990;105:46-8."},{"key":"ref_21","article-title":"Tilasto ulkalnM 1991. I'Lartwitatautitilamnc V; o1xoonaI 1988-1990 j'a rokotiiksot z*uosi)n 1987-1990 Sji(!n)nn'","author":"tervevshallitus, Sosiaalija","year":"1991","unstructured":"Sosiaalija tervevshallitus. Tilasto ulkalnM 1991. I'Lartwitatautitilamnc V;o1xoonaI 1988-1990 j'a rokotiiksot z*uosi)n 1987-1990 Sji(!n)nn' aqj. Hielsinki: Os Ylipistopaino, 1991.","journal-title":"aqj. Hielsinki: Os Ylipistopaino"},{"issue":"82","key":"ref_22","article-title":"Sexual behavior of college women in 1975, 1986, and 1989","volume-title":"X E 7iwlJAld","volume":"322","author":"DeBuono, B.; Zinner, S.; Daamen, M.; McCoormack, W.","year":"1990","unstructured":"DeBuono B, Zinner S, Daamen M, McCoormack W. Sexual behavior of college women in 1975, 1986, and 1989. X E 7iwlJAld 1990;322:82 I-5."},{"key":"ref_23","first-page":"48","article-title":"Risk factors for fatal venous thromboembolism","volume-title":"young ivomen. _nt7 Epidtiniod","volume":"21","year":"1992","unstructured":"Thorogood MN, M\\lann J, M\\urphv.:, \\'essev M\\I. Risk factors for fatal venous thromboembolism in young ivomen. _nt7 Epidtiniod 1992;21:48-52."},{"key":"ref_24","first-page":"331","article-title":"Oral contraceptive use and malignancies of the genital tract","volume":"1","author":"P, Beral V.Hannaford; K, Clifford","year":"1988","unstructured":"Beral V. Hannaford P, Clifford K. Oral contraceptive use and malignancies of the genital tract. Laicet 1988;ii:1 331-5.","journal-title":"Laicet"},{"key":"ref_25","first-page":"58","article-title":"Oral contraceptives and cervical neoplasia","volume":"43","author":"Brinton, L.A.","year":"1991","unstructured":"Brinton LA. Oral contraceptives and cervical neoplasia. (,(noitracptiot 1991; 43:58 1-95."},{"key":"ref_26","first-page":"281","article-title":"Cardiovascular death among woomen under 40 years of age using low-estrogen oral contraceptives and intrauterine desices in Finland from 1975 to 1984","volume":"163","author":"Hir-onen, E.; Iddnpaa-Heikkila, J.","year":"1990","unstructured":"Hir-onen E, Iddnpaa-Heikkila J. Cardiovascular death among woomen under 40 years of age using low-estrogen oral contraceptives and intrauterine desices in Finland from 1975 to 1984..Anl ()stet Gvnecol 1990;163:281-4."},{"issue":"23","key":"ref_27","first-page":"1","article-title":"'I'eenage pregnancv in Siveden and FinlandImplications for the United States","volume":"10","author":"Wallace, H, \\'ienonen Ne1","year":"1989","unstructured":"Wallace H, \\'ienonen Ne1. 'I'eenage pregnancv in Siveden and FinlandImplications for the United States.JAdolsic Healtih Care 1989;10:23 1-6.","journal-title":"JAdolsic Healtih Care"},{"key":"ref_28","first-page":"926","article-title":"Breast cancer in young women and use of oral contraceptives: possible modifying effects of formulation and age at use","volume-title":"Laticet","volume":"ii:","author":"M\\C, Pike; BE, Henderson; NID, Krailo; A, Duke; S, Roy","year":"1983","unstructured":"Pike M\\C, Henderson BE, Krailo NID, Duke A, Roy S. Breast cancer in young women and use of oral contraceptives: possible modifying effects of formulation and age at use. Laticet 1983;ii:926-30."},{"key":"ref_29","first-page":"53","article-title":"Teenage pregnancy in developed countries: determinants and policy implications. Faiil Plaiint Peripect","volume":"17","author":"true","year":"1985","unstructured":"Jones EF, Forrest JD, (Goldman N, Hensai SK, Lincoln R, Rosoff JI, et al. 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