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PubMed1983

Artificial sweeteners and lower urinary tract cancer: hospital vs. population controls.

In a case-control study conducted in 1978 in Detroit, Michigan, as part of the National Bladder Cancer Study, the proportions of artificial sweetener users in a hospital and a population control series were compared. The study was based on interviews with 305 hospital controls and 440 population controls, as well as 391 patients with transitional or squamous cell carcinoma of the lower urinary tract. The proportion of artificial sweetener users among all hospital controls was higher than that among population controls. Among male hospital controls, it was found that 44% had ever used artificial sweeteners, compared to 38% of the male population controls. For females, the corresponding proportions of artificial sweetener users were 55% and 42%. Thus, relative risks estimated using all hospital controls were lower than relative risks estimated using population controls. When controls hospitalized for obesity-related diseases were excluded from the hospital control group, the proportion of artificial sweetener users and the relative risks for males were identical to those estimated with population controls (relative risk = 1.1). These results suggest that restriction of the control group to those patients hospitalized for non-obesity related diseases is a satisfactory procedure for selecting a control group in hospital-based studies of the effects of artificial sweeteners. For females, little or no change in the proportion of artificial sweetener users or in the relative risks was observed after exclusion of controls hospitalized for obesity-related diseases. However, the number of female subjects was small, and the results noted for females may have been due to chance.

Adult↗
PubMed1995

Cairo: repackaging population control.

Aid agencies, charities, and other nongovernmental organizations once denounced population control programs as racist interference in the third world. Yet, at the United Nations Conference on Population and Development in Cairo last September, these same organizations endorsed very similar ideas. The U.N. can now claim that even its fiercest critics not only have muted their criticism of population control programs but now positively endorse them. Over the last 30 years, population control has been consciously repackaged by the U.S. establishment. The image of population control has changed from being overtly anti-third world to being about giving the people of the third world--especially women--basic rights in family planning. Wrapped up in the language of women's empowerment and environmentalism, the establishment's old arguments about there being too many nonwhite babies in the world, have, unfortunately, won the day.

Developing Countries↗
PubMed1995

Reproductive rights and population control in Zimbabwe.

The author argues that population control in Zimbabwe, in other developing countries, and even in developed countries is targeted at non-whites and at the poorer classes. She discusses fertility vaccines and male sterilization in this context, and makes the point that while the technology of population control flows from the North to the South, resources from the South are flowing North to maintain the economic status quo. "I think that the real population problem is the widening gap between a few greedy, irresponsible people, most of whom happen to be located in the North, and the rest of humankind, whose lives have been so denigrated that they are now merely statistics.... We can easily see that what should be feeding, clothing, housing, healing, pleasing Africans, goes North, all in the name of ¿development'."

Africa↗
PubMed1999

Variant genotypes of the low-affinity Fcgamma receptors in two control populations and a review of low-affinity Fcgamma receptor polymorphisms in control and disease populations.

Fcgamma-receptors (FcgammaR) provide a critical link between humoral and cellular immunity. The genes of the low-affinity receptors for IgG and their isoforms, namely, FcgammaRIIa, FcgammaRIIb, FcgammaRIIIa, FcgammaRIIIb, and SH-FcgammaRIIIb, are located in close proximity on chromosome 1q22. Variant alleles may differ in biologic activity and a number of studies have reported the frequencies of variant FcgammaR alleles in both disease and control populations. No large study has evaluated the possibility of a nonrandom distribution of variant genotypes. We analyzed 395 normal individuals (172 African Americans [AA] and 223 Caucasians [CA]) at the following loci: FcgammaRIIa, FcgammaRIIIa, and FcgammaRIIIb, including the SH-FcgammaRIIIb. The genotypic distributions of FcgammaRIIa, FcgammaRIIIa, and FcgammaRIIIb conform to the Hardy-Weinberg law in each group. There was no strong evidence that combinations of 2-locus genotypes of the 3 loci deviated from random distributions in these healthy control populations. The distribution of SH-FcgammaRIIIb is underrepresented in CA compared with AA (P < .0001) controls. A previously reported variant FcgammaRIIb was not detected in 70 normal individuals, indicating that this allele, if it exists, is very rare (<1%). In conclusion, we present data that should serve as the foundation for the interpretation of association studies involving multiple variant alleles of the low-affinity FcgammaR.

Alleles↗
PubMed1959

Sterile-male method of population control.

The principle of animal population control through the use of sexually sterile males has been demonstrated for insects. Sexually sterile males that retain their sexual vigor and behavior will exert greater influence in regulating animal populations than can be achieved by destroying or removing the same number of individuals from the population. This hypothesis is supported by calculations showing theoretical population trends in assumed insect and animal populations subjected to treatments that destroy or eliminate certain percentages of the individuals as compared with a procedure that retains or replaces the same number of males in the population after sterilization. The maximum regulating effect that can be achieved is in direct proportion to the ratio of sterile to fertile males competing for mates. The advantages of inducing sexual sterility in a natural population of an insect species by chemical or other treatment over the method of rearing and releasing a dominating population of sterile males are considered. It is suggested that the sterile-male method may have practical application for undesirable populations of certain wild animals as well as for insects.

Animals↗
PubMed1994

From population control to reproductive health: an emerging policy agenda.

This article reviews the background to the current debates between advocates of population control and reproductive health as frameworks for national and international health policies. Population control has been a dominant metaphor in international family planning programs since the 1960s. Population control has frequently meant pursuing a single-minded goal of fertility limitation, often without sufficient attention to the rights of family planning clients. This narrow focus has led to some coercive policies, numerous ethical violations, and ineffective family planning programs. In the last decade there has been the beginning of a policy shift, advocated by a growing number of activists and researchers in women's health, from population control to reproductive health. A reproductive health framework would provide a broader programmatic focus that could bring needed attention to such issues as sexually transmitted diseases, infertility, abortion, reproductive cancers and women's empowerment generally.

Female↗
PubMed2006

Health-related quality of life in patients waiting for major joint replacement. A comparison between patients and population controls.

BACKGROUND: Several quality-of-life studies in patients awaiting major joint replacement have focused on the outcomes of surgery. Interest in examining patients on the elective waiting list has increased since the beginning of 2000. We assessed health-related quality of life (HRQoL) in patients waiting for total hip (THR) or knee (TKR) replacement in three Finnish hospitals, and compared patients' HRQoL with that of population controls. METHODS: A total of 133 patients awaiting major joint replacement due to osteoarthritis (OA) of the hip or knee joint were prospectively followed from the time the patient was placed on the waiting list to hospital admission. A sample of controls matched by age, gender, housing and home municipality was drawn from the computerised population register. HRQoL was measured by the generic 15D instrument. Differences between patients and the population controls were tested by the independent samples t-test and between the measurement points by the paired samples t-test. A linear regression model was used to explain the variance in the 15D score at admission. RESULTS: At baseline, 15D scores were significantly different between patients and the population controls. Compared with the population controls, patients were worse off on the dimensions of moving (P < 0.001), sleeping (P < 0.001), sexual activity (P < 0.001), vitality (P < 0.001), usual activities (P < 0.001) and discomfort and symptoms (P < 0.001). Further, psychological factors--depression (P < 0.001) and distress (P = 0.004)--were worse among patients than population controls. The patients showed statistically significantly improved average scores at admission on the dimensions of moving (P = 0.026), sleeping (P = 0.004) and discomfort and symptoms (P = 0.041), but not in the overall 15D score compared with the baseline. In patients, 15D score at baseline (P < 0.001) and body mass index (BMI) (P = 0.020) had an independent effect on patients' 15D score at hospital admission. CONCLUSION: Although patients' HRQoL did not deteriorate while waiting, a consistently worse HRQoL was observed in patients waiting for major joint replacement compared with population controls.

Adult↗
PubMed2004

The moral lens of population control: condoms and controversies in southern Malawi.

The study presents an investigation of stories about condoms in southern Malawi. Malawians' concerns about coercive population control imposed by a national government or international cabal provide a moral lens through which condoms and other health promotions are viewed, with unknown but probably negative impact on the use of condoms. The focus of the study is on the long shadow cast by population control because it is underresearched and, in fact, virtually unmentioned in most studies of health promotion, yet appears to be common if not ubiquitous. Moreover, this long shadow poses a distinct challenge to HIV-prevention and intervention efforts. The data for the study were gathered by six Malawian research assistants in Balaka district, in southern Malawi, who kept journals over a period of three years in which they recorded conversations and everyday chats that they observed. These journals demonstrate that condoms do not arrive in communities as neutral, value-free objects; rather they enter a social setting permeated with ideas about health, self-protection, and danger. The lens of population control has proved to be both durable and flexible, providing a moral context in which both commodities and actors can be understood. Disentangling condoms from the symbolic nexus in which they are fused with disease, population control, and malevolence will be an ongoing challenge in the struggle to prevent the spread of HIV/AIDS in Malawi.

Adult↗
PubMed1995

Fertility control using intrauterine devices: an alternative for population control in wild horses.

The purpose of this study was to develop a contraceptive method for feral horses. The feral horse population has increased significantly in recent years despite attempts to control numbers. As in most wild animal population control programs, contraceptive methods must be easy to apply, cause minimal disruption to the social structure and be fully reversible. In the present study, we tested the effectiveness of an intrauterine device (IUD) for fertility control in mares. Six mares were fitted with a silastic O-ring-shaped IUD on July 1 of Year 1. The IUD-treated mares were turned out with 12 nontreated mares and a fertile stallion in a large pasture until October 20 (112 d). None of the IUD-treated mares and all the nontreated mares became pregnant. The IUD-treated mares were maintained separately from the stallion during the winter. Following removal of the IUD on April 27 of Year 2, the mares were again introduced to the pasture with the stallion together with 6 nontreated mares. For the 6 mares previously treated with an IUD, the mean interval from introduction to the stallion to conception was 17.5 +/- 5 d or 1.3 cycles per pregnancy, and all mares produced a normal foal at term. Subsequently, 19 recorded mare breeding seasons resulted in 18 foals. Uterine cytology and histopathology indicate that the IUD causes mild chronic endometritis without permanent changes in the endometrium. We conclude that based on our observations, the O-ring-shaped IUD is an effective, safe and practical contraceptive method for mares.

Journal Article↗
PubMed1987

Spontaneous and induced interferon production by peripheral blood leucocytes from control population and patients with herpes genitalis.

The spontaneous and PHA induced levels of interferon were measured in peripheral blood leucocyte cultures of twenty-eight individuals diagnosed as positive for herpes genitalis, and in a group of control subjects. As reported by Cunningham and Merigan [1983] for herpes labialis, leucocytes from individuals with herpes genitalis produced low levels of interferon spontaneously; however, similar results were found for individuals within the control population. No statistically significant difference could be found for PHA induced interferon levels, antigen induced interferon levels, or helper/suppressor cell ratios between the herpes genitalis population and control population. Our results indicate that interferon does not play a major role in the latency or recurrence of herpes genitalis.

Antigens, Viral↗
PubMed2002

Distressful symptoms and well-being after radical cystectomy and orthotopic bladder substitution compared with a matched control population.

PURPOSE: We compared subjective quality of life, well-being, urinary tract symptoms and distress in patients after radical cystectomy and orthotopic urinary reconstruction with those in a matched control population. MATERIALS AND METHODS: Included in this study were 101 consecutive recurrence-free patients who underwent radical cystectomy and orthotopic bladder substitution with an ileal urethral Kock neobladder at Herlev Hospital with a minimum followup of 1 year. A frequency matched control group comprising 147 individuals was selected from the same geographical region. Information was collected by an anonymous postal questionnaire and analyzed externally in Sweden. RESULTS: The prevalence of low or moderate psychological well-being (32% versus 36%) and subjective quality of life (30% versus 38%), and high or moderate anxiety (23% versus 18%) and depression (26% versus 37%) was similar in patients with an orthotopic neobladder and population controls. Patients with a neobladder felt as attractive as the control population. Of the operated men 94% had erectile dysfunction compared with 48% of controls. Daytime and nighttime urinary frequency was similar in patients and controls (3% and 3%, and 15% and 13%, respectively), while the prevalence of urinary leakage at least once monthly was higher in patients (18% versus 5%). Intermittent self-catheterization was performed by 26% of patients with a neobladder. Urinary tract infection (14% versus 6%) was more common and the prevalence of distressful bowel symptoms (14% versus 9%) was slightly more common in patients than in controls. CONCLUSIONS: Well-being and subjective quality of life in patients after radical cystectomy and orthotopic bladder substitution were similar to those in a matched control population.

Adaptation, Psychological↗
PubMed1993

[Comparative analysis of the level of heterozygosity for glucose phosphate isomerase (GPI) locus in silver foxes (Vulpes vulpes) of domesticated and control populations].

This communication is the first step of the studies on the correlation between protein polymorphism and the level of phenotypic diversity. The level of heterozygosity for glucose phosphate isomerase (GPI) locus was analysed in two populations of silver foxes. One of them has been selected for domestic behaviour during many years. This selection vector gave rise to many phenotypic novelties; 46% of the foxes analyzed has aberrant phenotypes. Another population was control bred under the same conditions of experimental farm of Siberian Dept. Russian Sci. with a commercial purpose. All the foxes analyzed from this population, except one, had a standard phenotype. Among 96 domestic foxes under analysis, only one heterozygotes for the GPI locus was detected. Among 112 control foxes, six were heterozygotes. In other words the data obtained indicate no correlation between the level of morphological diversity and the state of heterozygosity of the GPI locus.

Animals↗