Anticoncepción
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Examinando Anticoncepción por Autor "Oberle, Mark W."
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Ítem A case-control study of breast cancer and hormonal contraception in Costa Rica(JNCI, vol. 7, no. 1 (december 1987), 1987) Lee, Nancy C.; Rosero Bixby, Luis; Oberle, Mark W.; Grimaldo, Carmen; Whatley, Anne S.; Rovira, Elizabeth Z.By 1981, 11% of married women in Costa Rica ages 20-49 years had used depot-medroxyprogesterone acetate (DMPA) and 58% had used oral contraceptives (OCs). Since 1977, the Costa Rican Ministry of Health has maintained a nationwide cancer registry. These circumstances provided an opportunity for a population-based, case-control study of DMPA, OCs, and breast cancer in Costa Rica. Cases were 171 women ages 25-58 years with breast cancer diagnosed between 1982 and 1984; controls were 826 women randomly chosen during a nationwide household survey. Cases and controls were interviewed with the use of a standard questionnaire covering their reproductive and contraceptive histories. Logistic regression methods were used to adjust for confounding factors. While few cases or controls had ever used DMPA, DMPA users had an elevated relative risk (RR) estimate of breast cancer of 2.6 (95% confidence limits = 1.4-4.7) compared with never users. However, no do'se-response relationship was found; even the group of women who had used DMPA for less than 1 year had an elevated RR estimate (RR = 2.3; 95% confidence limits = 1.0-5.1). In contrast, OC users had no elevation in RR compared with never users (RR = 1.2; 95% confidence limits= 0.8-1.8). The results of the DMPA analysis are inconclusive. Before decisions are made on whether to continue providing this effective contraceptive method, other ongoing studies will need to confirm of refute these findings.—JNCI 1987; 79:1247-1254.Ítem Contraceptive use and fertility in Costa Rica, 1986(International Family Planning Perspectives, Vol. 14, No. 3, (September 1988), 1988) Oberle, Mark W.; Sosa Jara, Doris; Madrigal Pana, Johnny; Becker, Stan; Rosero Bixby, LuisContraceptive prevalence in Costa Rica is higher than almost anywhere else in Latin America, with 70 percent of currently married women using a contraceptive method. Differentials in contraceptive use by educational level and between urban and rural areas are actually quite small compared with those in other Latin American countries. While levels of contraceptive use among married women 20-44 years of age remained relatively stable between 1976 and 1986, total fertility rates increased slightly over that period, perhaps because of changing fertility intentions or changing patterns of contraceptive use. For example, Costa Rican women have increased their reliance on barrier methods and decreased use of the pill. The majority of women who were not practicing contraception were either pregnant or breastfeeding an infant; only about one in five nonusers could be considered candidates for contraceptive use. One-fifth of all 15-19-year-old women and two-fifths of all 20-24-year-olds had had premarital intercourse. Most young adults who had had premarital intercourse did not practice contraception at first intercourse.