Now showing items 1-17 of 17

    • A case-control study of breast cancer and hormonal contraception in Costa Rica 

      Rosero Bixby, Luis; Grimaldo Vásquez, Carmen; Rovira, Elizabeth; Lee, Nancy C.; Oberle, Mark W.; Watley, Anne S. (1987)
      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 ...
    • A Population-based Serosurveillance of Syphilis in Costa Rica 

      Larsen, Sandra A.; Oberle, Mark W.; Sánchez Braverman, Juana M.; Rosero Bixby, Luis; Vetter, Kathleen M. (1991-04)
      As part of a case-control study to investigate the high incidence of cervical cancer in Costa Rican women, the seroprevalence of the treponematoses, in particular, syphilis was determined. In each age group, women with a ...
    • Confirmación histología del diagnóstico de cáncer cérvico uterino en Costa Rica, 1982-84 

      Oberle, Mark W.; Rosero Bixby, Luis; Mekbel Achit, Saeed (1990)
      Un panel de patologías costarricenses efectuó un análisis histológico de las biopsias de 677 casos de cáncer de cuello de útero in situ e invasor diagnosticados en Costa Rica en 1982 - 1984. El panel confirmó el diagnóstico ...
    • Estudios de detección selectiva del cáncer de cérvix y del cáncer de mama en Costa Rica 

      Irwin, Kathleen L.; Oberle, Mark W.; Rosero Bixby, Luis (1990)
      El cáncer de cuello uterino (cáncer de cervix) y el cáncer de mama son las principales causas de morbilidad y mortalidad femenina por cáncer en Costa Rica. Se evaluaron los intentos de detección de estos dos tipos de cáncer ...
    • Fecundidad y uso de anticonceptivo en Costa Rica, 1987 

      Oberle, Mark W.; Sosa, Doris; Madrigal Pana, Johnny; Becker, Stan; Morris, Leo; Rosero Bixby, Luis (1989)
      La prevalencia de anticonceptivos en Costa Rica es una de las más altas de América Latina: el 70 por ciento de las mujeres actualmente casadas utilizan algún método anticonceptivo. Los diferenciales en el uso de anticonceptivos ...
    • Fertility change in Costa Rica 1960-84: analysis of retrospective lifetime reproductive histories 

      Oberle, Mark W.; Rosero Bixby, Luis (1989-10)
      Lifetime reproductive histories of a 1984-85 nationally representative sample of 870 women aged 25-59 years provided data to describe the evolution of fertility, contraception, breast-feeding, and natural fecundability ...
    • Herpes simplex virus type 2 antibodies: high prevelence in monogamous women in Costa Rica 

      Oberle, Mark W.; Rosero Bixby, Luis; Lee, Francis K.; Sánchez Braverman, María; Nahmias, Andre J.; Guinan, Mary E. (1989-08)
      We studied the prevalence of antibody to Herpes simplex virus types 1 and 2 (HSV-1 and HSV-2) in 766 randomly selected Costa Rican women 25-59 years of age in a national household survey in 1984-1985. Overall, 97.1% were ...
    • Oral Contraceptives and Cervical Cancer Risk in Costa Rica: Detection Bias or Causal Association 

      Irwin, Kathleen L.; Rosero Bixby, Luis; Oberle, Mark W.; Lee, Nancy C.; Whatley, Anne S.; Fortney, Judith A.; Bonhomme, Michele G. (1988-01)
      To examine the relationship between cervical cancer and oral contraceptive (OC) use, we analyzed data from a population-based, case-control study in Costa Rica. Women aged 25 to 58 years in whom cervical cancer was ...
    • Prevalencia de enfermedades de transmisión sexual en las mujeres de Costa Rica 

      Oberle, Mark W.; Rosero Bixby, Luis; Larsen, Sandra A. (1990)
      Pocos estudios han descrito Ia epidemiología de las infecciones por enfermedades de transmisión sexual (ETS) basándose en muestras serológicas representativas de Ia población en general y no solo en grupos selectos de ...
    • Reproductive history and breast cancer in a population of high fertility, Costa Rica, 1984-85 

      Rosero Bixby, Luis; Oberle, Mark W.; Lee, Nancy C. (1987)
      The relationship between breast cancer and women's reproductive history in Costa Rica was analyzed using logistic regression methods on data from 171 breast cancer cases and 826 population-based controls aged 25–58 years. ...
    • Screening practices for cervical and breast cáncer in Costa Rica 

      Irwin, Kathleen L.; Oberle, Mark W.; Rosero Bixby, Luis (1991)
      Cervical cancer and breast cancer are leading causes of cancer-related morbidity and mortality in Costa Rica. This article reports results of an evaluation of cervical and breast cancer screening practices among Costa ...
    • Seroepidemiology of Chlamydia in Costa Rica 

      Vetter, Kathleen M.; Barnes, R.C.; Oberle, Mark W.; Rosero Bixby, Luis; Schachter, Juluis (1990)
      A population-based study of the sero-epidemiology of chlamydia was performed among a nationally representative sample of 760 Costa Rican women aged 25 to 59 years. Interviews and sera collection were completed between ...
    • Seroprevalence of human T-Lymphotropic virus type I (HTLV-I) in Costa Rica 

      Khabbaz, Rima F.; Hartley, Trudie M.; Oberle, Mark W.; Rosero Bixby, Luis (1990)
      Infection within the human T linphotropic virus type I (HTLV-I), a virus associated with two diseases, adult T-cell leukemia lyriphornal and tropical spastic paraparesis/HTLV-I associated myelopathy,2 is prevalent in Panama' ...
    • Sexual Behavior, Sexually Transmitted Diseases, and Risk of Cervical Cancer 

      Stone, Katherine M.; Zaidi, Akbar; Rosero Bixby, Luis; Oberle, Mark W.; Reynolds, Gladys; Larsen, Sandra A.; Nahmias, Andre J.; Lee, Francis K.; Schachter, Juluis; Guinan, Mary E. (1995-03-14)
      To explore sexually transmitted diseases and sexual behavior as risk factors for cervical cancer, we analyzed data from a population-based case-control study of breast and cervical cancer in Costa Rica. Data from 415 cases ...
    • Susceptibilidad al tétanos y rubeola de las mujeres de Costa Rica, 1984-1985 

      Ramírez, Jorge A.; Rosero Bixby, Luis; Oberle, Mark W. (1988)
      Se documenta por primera vez en Costa Rica, el nivel de susceptibilidad al tétanos y la rubéola en la población femenina costarricense entre los 25 y 29 años. Se encuestó a 805 de las mujeres (93%) que conformaban la ...
    • Tabaquismo en la mujer costarricense, 1984-85 

      Rosero Bixby, Luis; Oberle, Mark W. (1987)
      En este artículo se analizan los resultados de una encuesta con representatividad nacional de 870 mujeres costarricenses de 25 a 59 años de edad, entrevistadas entre 1984 y 1985. El 14 por ciento de las entrevistadas ...
    • The effect of using different reference dates for control exposure measurement on relative risk estimates in a case-control study 

      Rampey, Alvin H.; Irwin, Kathleen L.; Oberle, Mark W.; Kinchen, Steven; Lee, Nancy C.; Marsden, Anne; Rosero Bixby, Luis (1993-05)
      In case-control studies in which case and control enrollment periods are not identical, exposure status for time-dependent variables is often measured relative to a reference date. Using data from a case-control study of ...