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Biomedical subjects

C A Bachrach

Publications and source records attributed to C A Bachrach.

15 recordsLinked to original sources
PubMed1979

Recall and reliability of interview data from older women.

Retrospective fertility histories were collected from a purposive sample of 211 white, ever-married women, residing in four metropolitan areas of the USA and belonging to the birth cohorts of 1901-1910. At the time of interview, these women were aged 66 to 76. A random sample of 50 of the original respondents was reinterviewed by telephone on selected topics from the questionnaire. Responses to questions on dates and numbers of marriages, as well as births and other fertility events were coded to show whether the responses were exact, estimated by the respondent, or calculated by the editors. Respondents provided exact answers to an average of 90% of the questions they were asked. Reliability ratios, which were calculated for the above variables as well as ever-use of contraceptive methods, were comparable with those observed in previous studies of women in the childbearing years.

Aged↗
PubMed1978

Selection of MEDLINE contents, the development of its thesaurus, and the indexing process.

The operation of MEDLINE requires three ongoing activities by persons having subject matter knowledge. These are literature selection, thesaurus maintenance and indexing. MEDLINE is intended to give access to the most generally useful biomedical literature rather than to provide indiscriminate comprehensive coverage. Literature is selected with the guidance of a group of health-science educators, editors and librarians who review periodicals under consideration for inclusion and re-evaluate those that are already regularly indexed. The MeSH thesaurus provides the descriptors that are used for subject indexing. Its hierarchical structure facilitates both general and specific searching. The appearance of new concepts and terminology in the literature requires a dynamic MeSH, but MeSH changes may complicate the process of searching backward in time. Maintaining MeSH requires finding a balance between the need for adaptability and the need for stability. Quality indexing requires accuracy and consistency in the assignment of subject headings. To this end, indexers receive didactic training plus practice under supervision. Precedents for indexers are detailed in an extensive Indexer's Manual and in MeSH annotations. Work of all indexers is reviewed on at least a sampling basis, and special sessions are held each year to familiarize indexers with MeSH changes.

Abstracting and Indexing↗
PubMed1968

Medlars.

Explore the source record for details and available documents.

Humans↗
PubMedDate not supplied

Relinquishment of premarital births: evidence from national survey data.

According to 1982 and 1988 NSFG data, unmarried white women are far less likely than they were in the early 1970s to place their children for adoption. The levels of relinquishment among black women have remained low throughout this period, and relinquishment among Hispanic women may be virtually nonexistent. Multivariate analysis of the determinants of relinquishment among unmarried non-Hispanic white women suggests that having a well-educated mother, being in school at the time of conception, having no labor force experience, and being older are positively associated with placing a child for adoption. Sons were found to be less likely to be relinquished than daughters.

Adoption↗
PubMedDate not supplied

What do women use when they stop using the pill?

Current use of oral contraceptives among currently married women aged 15-44 declined from 25 percent to 13 percent between 1973 and 1982, while ever-use increased from 60 percent to 80 percent. By 1982, the pill appeared to be used mainly to delay first pregnancies, secondarily to space subsequent conceptions, and only rarely as a means of ending childbearing. Most women who had stopped using the pill by 1982 had done so on their own initiative: Only about one-third had been advised by a doctor to discontinue use. Virtually all former users gave some physical problem connected with pill use as a reason for quitting the method. At the time they quit, former users had been taking the pill for an average of 3.2 years. The decline in current use of the pill during the 1970s coincided with a marked increase in contraceptive sterilization, but was not the result of a direct switching from the pill to sterilization by individual women. Only 21 percent of women who quit the pill chose sterilization as their next method. The majority--60 percent--switched to nonpermanent methods, the condom being the most popular in all age-groups; the proportions selecting the condom as their next method ranged from 20 percent of 15-19-year-olds to 12 percent of 30-44-year-olds. Nineteen percent of former pill users did not adopt any method after discontinuing the pill.

Abortion, Induced↗
PubMedDate not supplied

First premarital contraceptive use: United States, 1960-82.

This study shows the first national estimates of trends and differentials in first contraceptive use for a national sample of all women. Only 47 percent of women aged 15-44 in 1982 (or their partners) used a method at first premarital intercourse. The leading method at first intercourse was the condom, followed by the pill and withdrawal. The percentage using a method increased from the early 1960s to the late 1970s, because of increases in use of the pill and withdrawal. However, in the early 1980s, use at first intercourse increased sharply because of an increase in use of the condom. The proportion who used a method at first intercourse varied from 22 percent among Hispanic women to 74 percent among Jewish women; it was higher among white than black women, and higher in higher socioeconomic categories. After first intercourse, contraceptive use did not vary significantly by socioeconomic characteristics. While the condom was the leading method at first intercourse, women who practiced contraception for the first time after first intercourse typically used the pill.

Adolescent↗