Clinical effects of growth hormone on bone: a review

Growth hormone (GH) stimulates bone turnover. Deficiency of GH due to hypopituitarism is related to low bone mineral density and increased fracture risk. GH substitution increases and thus normalizes bone mineral density in these patients, which is one of a number of arguments for GH substitution in hypopituitarism. In contrast, a possible therapeutic use of GH in idiopathic osteoporosis and glucocorticoid-induced osteoporosis is speculative and not established. Reduction of osteoporosis risk is an argument brought up for a use of GH in healthy elderly persons (anti-aging medicine). However, since only very limited data are available yet, this cannot be based on scientific evidence, and there are important concerns about the safety of use of GH in healthy elderly persons.     

The acquisition of basic sex information

Previously unpublished data from the Kinsey sample concerning the acquisition of basic sex information are presented. These are contrasted to data obtained from a similar, but smaller sample of respondents from the current generation. Basic facts about sex are being learned at considerably younger ages today, apparently as a result of increased maternal effort to provide information, increased sex education in the schools, and more explicit treatment of sex in the media. Same‐sex peers remain the dominant educators, but other sources, notably mothers, have increased in importance. The sex differences in age of acquisition found in the Kinsey sample have largely disappeared.     

从全球人口百年(1950～2050)审视我国人口国策的抉择

基于“人口众多”这一基本国情,我国自20世纪80年代前后采取了严格控制人口增长的政策。对于这一政策应科学、全面地衡量其利害得失。文章利用全球人口资料和我国历次人口普查及人口预测资料,从人口规模、结构的发展变化作实证研究。最终认为,我国的人口国策是利大于弊。     

Permutation tests — A revival?!

It is shown that permutation tests have optimum properties for interesting classes of continuous distributions as well as for discrete ones. General conditions sufficient for uniformly maximal power on subclasses are given. Moreover, a variety of examples is presented. Research supported by Deutsche Forschungsgemeinschaft (DFG) grant No. Schm 677/5-1     

A Study of An Alternative School for Pregnant and/or Parenting Teens: Quantitative and Qualitative Evidence

In response to multiple problems faced by pregnant and parenting teens, many alternative school-based comprehensive programs have been established throughout the United States. By collecting data from a sample of enrollees of such a school-based comprehensive program and comparing them with data collected from a sample of non-enrollees, the present study systematically evaluates the program. The results of the study seem to suggest that the program participants were more likely to have higher educational aspiration, better reproductive health outcomes, higher contraceptive use, and more breast-feeding practice and intention than those of their non-participating counterparts. The implications of the study findings for comprehensive school-based program for pregnant and/or parenting teens are discussed.Ruhul Amin is a Senior Fellow at the Center for Health Disparities Solutions and Senior Research Scientist in the Institute for Urban Research, Morgan State University, Baltimore, MD 21239. Dorothy C. Browne is the Director of the Institute for Urban Research, Jamir Ahmed is a research assistant at the Center for Health Disparities Solutions and Takanori Sato is research assistants at the Institute for Urban Research, Morgan State University, Baltimore, MD 21239.     

Patients' Evaluations of Gynecologic Services Provided by Nurse Practitioners

Abstract

The development, operating principles, and users' evaluations of a broad-based gynecologic program emphasizing effective birth control on a university campus are discussed. A major feature that is explored is the use of nurse practitioners as the primary service providers. The forces that resulted in the formation of the program and the methods used to enhance its effectiveness are described. The evaluations of 3,527 users over a three-year period are indicated by summarizing responses to a questionnaire covering the following topics; whether providing such a service was helpful, likelihood of arranging for the service elsewhere if unavailable at the health center, attitudes of staff, medical procedures used, availability of services, and the opportunity to thoroughly discuss concerns. The evaluations were seen as extremely supportive of both the program and the use of nurse practitioners in this setting.     

On self-interest and greed

First the assumption of self-interest as applied in Economics is presented. Here we also discuss areas in which (many) people behave less self- but more other-regarding than traditional economic models assume. Then, greedy behaviour is considered as existing in the political and economic ‘world’. Here we refer to corruption as well as to the role of money as a positional good. We also discuss such behaviour in the academic world, in which money plays a role as well as reputation. Thus, while the assumption of mutually disinterested rationality is a very powerful instrument for analysing individual behaviour, to explain some phenomena we have to recognise that people are not only sometimes other-regarding, but also sometimes greedy, and that they might value money much more than traditional Economics assumes. We conclude with some remarks on what we can learn in this respect from Behavioural Economics.