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Guest AM 《Demography》1974,11(3):457-472
Using well-known techniques of regression analysis, we decompose the crude birth rate into six analytical components, indicating illegitimacy, the marriage rate, legitimate fertility, and sex and age composition. All the components except sex structure are important in determining differences in crude birth rates across countries of the world. The model is elaborated by showing how economic development affects the crude birth rate through its basic demographic components.  相似文献   

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Abstract This paper represents an initial attempt to formalize the relationships among post-partum sterility, fecundability, and contraceptive acceptance in terms of absorbing Markov chains. Acceptance of contraception offered by family planning programmes is analyzed as a possible event in time for a cohort of recently delivered women as they pass through phases of temporary sterility and fecundability towards another possible pregnancy. The results of the study indicate that once a woman leaves the post-partum anovulatory stage, the probability of her becoming pregnant again is large compared to the competing rates of contraceptive acceptance currently in force. Unless highly fecund non-contracepting women are approached by family planning programmes shortly after a pregnancy has been terminated (by childbirth or abortion), they will quickly become ineligible to accept either the pill or IUD because of once again being 'currently pregnant'.  相似文献   

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Background

There is little published research that has examined practitioners’ views and experiences of pain relieving measures commonly used during labour and birth, particularly for non-pharmacological measures such as water immersion. Furthermore, there is minimal published research examining the process of policy and guideline development, that is, the translation of published research to usable practice guidance.

Aims

The aims of phase three of a larger study were to explore midwives knowledge, experiences and support for the option of water immersion for labour and birth in practice and their involvement, if any, in development of policy and guidelines pertaining to the option.

Methods

Phase three of a three phased mixed methods study included a web based survey of 234 Australian midwives who had facilitated and/or been involved in the development of policies and/or guidelines relating to the practice of water immersion.

Findings

Midwives who participated in this study were supportive of both water immersion for labour and birth reiterating documented benefits of reduced pain, maternal relaxation and a positive birth experience. The most significant concerns were maternal collapse, the difficulty of estimating blood loss and postpartum haemorrhage whilst barriers included lack of accredited staff, lifting equipment and negative attitudes. Midwives indicated that policy/guideline documents limited their ability to facilitate water immersion and did not always to support women’s informed choice.

Conclusion

Midwives who participated in this study supported the practice of water immersion reiterating the benefits documented in the literature and minimal risk to the woman and baby.

Ethical considerations

The Human Research Ethics Committee of the University of South Australia approved the research.  相似文献   

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This article demonstrates how members of a lesbian community of practice make interactional moves that allow them to position themselves as "authentically lesbian." Through the use of discourse analysis and a sociocultural linguistics focus on indexicality, the speakers are shown to invoke broadly accessible stereotypes and ideologies and to rework them in order to create locally specific, meaningful identities. This is achieved via mutually negotiated stance taking toward group-constructed, oppositional personae. Specifically, the women in this group position styles deemed as "girly" as inauthentic and antithetical to their concept of a lesbian--the authentic "dyke."  相似文献   

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BackgroundIn July 2017, Victoria’s largest maternity service implemented a new clinical practice guideline to reduce the rates of term stillbirth in women of South Asian background.AimTo capture the views and experiences of clinical staff following the implementation of the new clinical guideline.MethodsCross sectional survey of clinical staff providing maternity care in August 2018, 12 months post implementation. Staff were asked to provide their agreement with ten statements assessing: perceived need for the guideline, implementation processes, guideline clarity, and clinical application. Open-ended questions provided opportunities to express concerns and offer suggestions for improvement. The frequency of responses to each question were tabulated. Open ended responses were grouped together to identify themes.FindingsA total of 120 staff completed the survey, most (n = 89, 74%) of whom were midwives. Most staff thought the rationale (n = 95, 79%), the criteria for whom they applied (83%, n = 99), and the procedures and instructions within the guideline were clear (74%, n = 89). Staff reported an increase in workload (72%, n = 86) and expressed concerns related to rationale and evaluation of the guidelines, lack of education for both staff and pregnant South Asian women, increased workload and insufficient resources, patient safety and access to care. Challenges relating to shared decision making and communicating with women whose first language is not English were also identified.DiscussionThis study has identified key barriers to and opportunities for improving implementation and highlighted additional challenges relating to new clinical guidelines which focus on culturally and linguistically diverse women.  相似文献   

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The relationship between educational qualifications and labour market outcomes has been perhaps the dominant theme in research on school to work transitions. A range of explanations has been offered for this relationship, but such explanations have often been quite static in nature or assumed that any trend is linear. This article explores the dynamics of educational credentialism using Ireland as a case study. Using data from the national School Leavers’ Survey for the period 1984-2007, it examines the way in which two dimensions of education - level and grades - have influenced early labour market outcomes over a period shifting from high unemployment to dramatic employment growth. The analyses presented point to both long-term and short-term changes in the education-employment relationship. An increase in the proportion of young people with upper secondary qualifications is found to result in a growing gap in employment chances between the more and less qualified. Furthermore, employers are found to rely on different educational signals depending on broader economic conditions, with grades assuming a more important role in accessing employment when jobs are scarce. It is argued that the Irish example points to a more comprehensive framework for understanding the dynamics of credentialism.  相似文献   

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It has recently been claimed that Sen’s capabilities approach can be used to advise the formation of public policy related to human wellbeing. It has also been proposed that measures of subjective wellbeing are inadequate for this purpose. These ideas are examined in relation to capabilities, using the same reference material as the proposing author. The theory of subjective wellbeing homeostasis is used as the alternative framework by which to understand the potential of subjective wellbeing for policy advice. This examination reveals an almost complete lack of evidence that capability measurement could fulfill the suggested role. While subjective wellbeing has more potential for this purpose, caveats to its employment for policy advice are also evident.  相似文献   

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Mating behavior and the male's contribution to female fecundity were studied in the bean weevil Bruchidius dorsalis (Fahraeus) (Coleoptera: Bruchidae) in comparison with two other species, Callosobruchus chinensis (which infests stored beans) and Kytorhinus sharpianus (which feeds on wild legumes). Only females of B. dorsalis showed multiple mating and characteristic precopulatory behavior that appeared to solicit the male's nutritious secretion. In contrast, all females of the other two species did not copulate multiply and did not show such precopulatory behavior. In B. dorsalis, the decrement of male body weight just after copulation indicated that seminal fluid weighing as much as approximately 7% of the male's body weight was transferred to the female. Fecundity was more than eight times higher in females that had copulated ten times than in females that had copulated only once, indicating that males paid most of the nutritional cost of egg production. These facts suggest that the sex role is reversed in B. dorsalis. Received: May 22, 1998 / Accepted: July 19, 1999  相似文献   

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Functional alary polymorphisms have been studied rather extensively in several insect species. This review article deals with factors controlling wing polymorphism in a flightless species,Pyrrhocoris apterus (L.), and discusses its adaptive significance and mechanisms for their persistence under natural conditions. The macropterous morph is determined by a recessive allele whose penetrance depends on photoperiod and temperature. Natural populations of this species contain a small fraction of flightless macropters. The disadvantages of being a macropter (increase of development time, decrease of fecundity) are minimal, while the benefit may consist in the tendency to prereproductive arrest of ovarian development in teneral females. It prevents establishing a second generation which would mostly die during the next winter. The mechanism of alary morph regulation may be an ancestral trait linkingP. apterus with other polymorphic Heteroptera, while its decreased penetrance may be a derivative character. Variation in fitness due to alary morphs is small compared to the one associated with differences in body size. The latter is environmentally determined, and not linked to the genetic basis of wing polymorphism. In the “mosaic” of phenotypes of various size the significance of the genetic macroptery may be close to neutral.  相似文献   

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This paper reports a study designed to develop and validate a measure of quality of college life (QCL) of students. Using a theoretical model based on a build-up approach to QCL, the authors provide an empirical examination of various hierarchical components and their properties. The method is executed in two stages. The first stage is used to clarify the particular elements for inclusion in the model. The second phase uses a sample of students drawn for the campuses of three major universities in the United States. These samples were used to test several hypotheses regarding the model and its components. The results generally provide support. Finally, the discussion centers on the value of the model in application by both university officials and public policy officials in the at-large community.  相似文献   

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In 1982, Mathews et al. surveyed San Diego County Medical Society's (SDCMS) physicians about their attitudes toward homosexuality. They found significant differences in prevalence of homophobic attitudes by gender, year of medical school graduation, specialty, and practice setting. To assess current physicians' attitudes toward homosexuality and persons with HIV infection, an anonymous, self-administered, 17-item survey was mailed to all 4,385 members of the SDCMS and 1,271 UCSD physicians. The survey included items measuring attitudes toward homosexuality and toward entry to medical school and referral patterns, conditional on sexual orientation and HIV status of hypothetical referents. Only 3% of respondents would not admit a highly qualified homosexual applicant to medical school compared with 30% in 1982. Similarly, 9% would discontinue referrals to a gay pediatrician compared with 46% of respondents in 1982. Forty-two percent would not admit a "highly qualified but asymptomatic HIV-infected applicant with excellent response to antiretroviral therapy to medical school" and 66% would discontinue referral to a general surgeon known to be HIV infected. In multiple logistic regression analyses controlling for sex and medical school affiliation, significant (p < 0.05) independent predictors of being in the highest 10% on an HIV-phobia scale were year of graduation from medical school and degree of homophobia (model ROC = 0.77). This survey suggests a substantial reduction in homophobia since 1982. However, attitudes toward homosexuals and year of graduation from medical school appear to be significant predictors of attitudes toward persons with HIV infection.  相似文献   

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Aim

To gather Aboriginal women’s stories of smoking and becoming pregnant to identify the barriers in accepting smoking cessation support during pregnancy.

Methods

Qualitative data were collected through use of yarning methodology between August 2015 and January 2016 by an Aboriginal Researcher with experience in social and community services. A short on-line survey was used to collect quantitative data. Interviews only recorded the therapeutic yarning process, which ranged from 9 to 45 min duration, averaging 30 min. Audio-recorded interviews were transcribed and independently coded. A general inductive analysis was used to determine emergent themes.

Results

Twenty Aboriginal women between 17–38 years of age, who were pregnant or recently given birth, living in the Hunter New England (HNE) area took part. Eleven women were still smoking; nine had quit. Most were highly aware of the implications of smoking for their babies. Major themes identified for accepting support were: ambivalence towards a need for support, health professional advice, reduction in smoking, and attitudes to Nicotine Replacement Therapy (NRT). Women reported being advised to cut down, rather than to quit; reducing consumption may be a barrier to accepting NRT. Women recommended enhanced clinical support and Aboriginal community engagement in cessation care.

Discussion/conclusions

Aboriginal women in the HNE area reported quitting or reducing their cigarette intake during pregnancy. Health Professionals working with Aboriginal women during pregnancy should give consistent messages to quit smoking completely, and offer increased, ongoing and extensive smoking cessation support to Aboriginal mothers. Clinical practices could partner with Aboriginal communities to support the delivery of smoking cessation services.  相似文献   

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