Jon Amastae

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BACKGROUND Fear of side effects and previous negative experiences are common reasons for contraceptive nonuse. STUDY DESIGN We collected information about perceptions of oral contraceptive (OC) safety from 1271 women 18-49 years old in El Paso, TX, and compared their responses to a medical evaluation by a nurse practitioner. We also asked participants(More)
BACKGROUND Progestin-only oral contraceptive pills (POPs) have fewer contraindications to use compared to combined pills. However, the overall prevalence of contraindications to POPs among reproductive-aged women has not been assessed. STUDY DESIGN We collected information on contraindications to POPs in two studies: (1) the Self-Screening Study, a sample(More)
OBJECTIVE To estimate how well a convenience sample of women from the general population could self-screen for contraindications to combined oral contraceptives using a medical checklist. METHODS Women 18-49 years old (N=1,271) were recruited at two shopping malls and a flea market in El Paso, Texas, and asked first whether they thought birth control(More)
CONTEXT Sterilization is the most commonly used contraceptive in the United States, yet access to this method is limited for some. METHODS A 2006-2008 prospective study of low-income pill users in El Paso, Texas, assessed unmet demand for sterilization among 801 women with at least one child. Multivariable logistic regression analysis identified(More)
OBJECTIVES As part of the Border Contraceptive Access Study, we interviewed oral contraceptive (OC) users living in El Paso, Texas, to assess motivations for patronizing a US clinic or a Mexican pharmacy with over-the-counter (OTC) pills and to determine which women were likely to use the OTC option. METHODS We surveyed 532 clinic users and 514 pharmacy(More)
OBJECTIVE To estimate differences in continuation of oral contraceptive pills (OCPs) between U.S. resident women obtaining pills in U.S. family planning clinics compared with over-the-counter in Mexican pharmacies. METHODS In El Paso, Texas, we recruited 514 OCP users who obtained pills over the counter from a Mexican pharmacy and 532 who obtained OCPs by(More)
OBJECTIVE To compare the estimated proportion of contraindications to combined oral contraceptives between women who obtained combined oral contraceptives in U.S. public clinics compared with women who obtained combined oral contraceptives over the counter (OTC) in Mexican pharmacies. METHODS We recruited a cohort of 501 women who were residents of El(More)
BACKGROUND Interest is growing in moving oral contraceptives over-the-counter (OTC), although concerns exist about whether women would continue to get preventive health screening. STUDY DESIGN We recruited cohorts of US-resident women who obtained oral contraceptives from US family planning clinics (n=532) and OTC from pharmacies in Mexico (n=514) and(More)
Inherent in many reproductive health and family planning programmes is the problematic assumption that the body, its processes and modifications to it are universally experienced in the same way. This paper addresses contraceptive knowledge and beliefs among Mexican-origin women, based upon data gathered by the qualitative component of the Border(More)
On the U.S.-Mexico border, residents frequently cross into Mexico to obtain medications or medical care. We previously reported relatively high prevalence of hypertension among Latina oral contraceptive users in El Paso, particularly those obtaining pills over the counter (OTC) in Mexico. Here, we examine factors associated with having hypertension among(More)
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