Positive selection of type 2 diabetes genotypes - the glycaemic threshold hypothesis.

The high prevalence of deleterious polygenic type 2 diabetes (T2D) is a paradox requiring explanation beyond food excess, inactivity and the obesity resulting from positive energy balance. Historically, hunting-foraging and later agrarian communities often manifested a converse negative energy balance due to nutritional deficit and/or high physical energy demand - both potentially resulting in hypoglycaemia. Since hypoglycaemia impairs both reproductive fitness and cognitive function, it is proposed that that by expressing resistance to hypoglycaemia, T2D phenotypes were subject to positive selection. The insulin resistance present in often-associated atherosclerotic cardiovascular disease, metabolic syndrome and polycystic ovarian disease may also explain their frequent coexistence and current prevalence.

Transdisciplinary translational science and the case of preterm birth.

Medical researchers have called for new forms of translational science that can solve complex medical problems. Mainstream science has made complementary calls for heterogeneous teams of collaborators who conduct transdisciplinary research so as to solve complex social problems. Is transdisciplinary translational science what the medical community needs? What challenges must the medical community overcome to successfully implement this new form of translational science? This article makes several contributions. First, it clarifies the concept of transdisciplinary research and distinguishes it from other forms of collaboration. Second, it presents an example of a complex medical problem and a concrete effort to solve it through transdisciplinary collaboration: for example, the problem of preterm birth and the March of Dimes effort to form a transdisciplinary research center that synthesizes knowledge on it. The presentation of this example grounds discussion on new medical research models and reveals potential means by which they can be judged and evaluated. Third, this article identifies the challenges to forming transdisciplines and the practices that overcome them. Departments, universities and disciplines tend to form intellectual silos and adopt reductionist approaches. Forming a more integrated (or 'constructionist'), problem-based science reflective of transdisciplinary research requires the adoption of novel practices to overcome these obstacles.

State welfare reform policies and maternal and child health services: a national study.

OBJECTIVES: Welfare reform (Personal Responsibility and Work Opportunity Reconciliation Act of 1996) resulted in dramatic policy changes, including health-related requirements and the administrative separation of cash assistance from Medicaid. We were interested in determining if changes in welfare and health policies had had an impact on state MCH services and programs. METHODS: We conducted a survey in fall 1999 of state MCH Title V directors. Trained interviewers administered the telephone survey over a 3-month period. MCH directors from all 50 states, Washington, DC, and Puerto Rico participated (n = 52; response rate = 100%). RESULTS: Among the most noteworthy findings is that similar proportions of respondents reported that welfare policy changes had either helped (46%) or hindered (42%) the agency's work, with most of the positive impact attributed to increased funding. MCH data linkages with welfare and other social programs were low. Despite welfare reform's emphasis on work, limited services and exemptions were available for mothers with CSHCN. Almost no efforts have been undertaken to specifically address the needs of substance abusers in the context of new welfare policies. CONCLUSIONS: Few MCH agencies have developed programs to address the special needs of women receiving TANF who either have health problems themselves or have children with health problems. Recommendations including increased MCH and family planning funding and improved coordination between TANF and MCH to facilitate linkages and services are put forth in light of reauthorization of PRWORA.

State income inequality, household income, and maternal mental and physical health: cross sectional national survey.

OBJECTIVE: To examine the association of state income inequality and individual household income with the mental and physical health of women with young children. DESIGN: Cross sectional study. Individual level data (outcomes, income, and other sociodemographic covariates) from a 1991 follow up survey of a birth cohort established in 1988. State level income inequality calculated from the income distribution of each state from 1990 US census. SETTING: United States, 1991. PARTICIPANTS: Nationally representative stratified random sample of 8060 women who gave birth in 1988 and were successfully contacted (89%) in 1991. MAIN OUTCOME MEASURES: Depressive symptoms (Center for Epidemiologic Studies depression score >15) and self rated health RESULTS: 19% of women reported depressive symptoms, and 7.5% reported fair or poor health. Compared with women in the highest fifth of distribution of household income, women in the lowest fifth were more likely to report depressive symptoms (33% v 9%, P<0.001) and fair or poor health (15% v 2%, P<0. 001). Compared with low income women in states with low income inequality, low income women in states with high income inequality had a higher risk of depressive symptoms (odds ratio 1.6, 95% confidence interval 1.0 to 2.6) and fair or poor health (1.8, 0.9 to 3.5). CONCLUSIONS: High income inequality confers an increased risk of poor mental and physical health, particularly among the poorest women. Both income inequality and household income are important for health in this population.

The impact of managed care insurance on use of lower-mortality hospitals by children undergoing cardiac surgery in California.

CONTEXT: Managed care plans aggressively seek to contain costs, but few data are available regarding their impact on access to high quality care for their members. OBJECTIVE: To assess the impact of managed care health insurance on use of lower-mortality hospitals for children undergoing heart surgery in California. DESIGN: Retrospective cohort study using state-mandated hospital discharge datasets. SETTING: Pediatric cardiovascular surgical centers in California. PATIENTS: Five thousand seventy-one children admitted for open cardiac surgical procedures during 1992-1994. RESULTS: Hospitals were divided into lower- and higher-mortality groups according to adjusted surgical mortality. Using multivariate logistic regression analysis to control for medical, socioeconomic, demographic, and distance factors, children with managed care insurance were less likely to be admitted to a lower-mortality hospital for surgery relative to children with indemnity insurance (odds ratio:.53; 95% confidence interval:.45,.63). Similar findings resulted when the analysis was stratified by race/ethnicity. In addition, length of stay, a correlate of health care costs, was no longer for children admitted to lower-mortality centers than for those at higher-mortality centers (adjusted difference:.54 days shorter at lower-mortality centers; 95% confidence interval: -1.50,. 41). CONCLUSIONS: During this study, children with managed care insurance had significantly reduced use of lower-mortality hospitals for pediatric heart surgery in California compared with children with indemnity insurance. Further study is necessary to determine the mechanisms of this apparent insurance-specific inequity.

State welfare reform policies and declines in health insurance.

OBJECTIVES: This study sought to determine whether there is a relationship between state policies on Temporary Assistance to Needy Families (TANF), declines in both TANF and Medicaid caseloads, and the rise in the number of uninsured. METHODS: Extant data sources of state TANF policies, TANF and Medicaid participation, and uninsurance rates were analyzed, with the state as the unit of analysis. The independent variables included state TANF policies that directly address receipt of benefits or relate to health; dependent variables included changes in state TANF enrollment, Medicaid enrollment, and health insurance status since the enactment of the law. RESULTS: In the bivariate analysis, declines in Medicaid were associated with sanction for work noncompliance, lack of a child care guarantee, and strategies to deter TANF enrollment; this last factor was also associated with increased uninsurance. In the multivariate analysis, lack of a child care guarantee and deterrent strategies predicted TANF declines; deterrent strategies predicted Medicaid decline and uninsurance increases. CONCLUSIONS: This analysis suggests that policies deterring TANF enrollment may contribute to declines in Medicaid and increased uninsurance. To maintain health insurance for the poor, policymakers should consider revising policies that deter TANF enrollment.

The scope of unmet maternal health needs in pediatric settings.

OBJECTIVE: Previous work has focused attention on the prevalence of specific maternal health problems known to affect children, such as smoking or depression. However, the cumulative health burden experienced by mothers and the potential for a practical pediatric health services response have not been examined. The aims of this study were to characterize: 1) the prevalence and cumulative burden of maternal health behaviors and conditions, 2) maternal access to a source of comprehensive adult primary care, and 3) maternal perceptions of a pediatric role in screening and referral. METHODS: We surveyed 559 consecutive women bringing a child 18 months of age or less to one of four pediatric primary care sites between July 1996 and May 1997. The pediatric sites included one outpatient program in an academic hospital, one in a community health center, and two in-staff model practices of a managed care organization (these last two were combined for analysis). The self-administered questionnaire contained previously validated questions to assess health behaviors and conditions (smoking, alcohol abuse, depression, violence, risk for unintended pregnancy, serious illness, self-reported health) and access to care (regular source, regular provider, health insurance, care delayed or not received). Maternal attitudes toward a pediatric role in screening and referral were also elicited. RESULTS: In the three settings, response rates ranged from 75% to 84%. The average age of the women ranged from 25.1 to 32. 1 years and the average age of the children ranged from 6.5 to 8.0 months. Across the settings, the percentage of women reporting at least one health condition (66%-74%) was similarly high, despite significant demographic differences among sites. Many women reported more than one condition (31%-37%); among all women who smoked, 33% also screened positive for alcohol abuse, 31% for emotional or physical abuse, and 48% for depression. Access to comprehensive adult primary care was variable with 23% to 58% of women reporting one or more barriers depending on the site. Across all sites, >85% of mothers reported they would "not mind" or "would welcome" a pediatric role in screening and referral. CONCLUSIONS: Two-thirds of women bringing their children for pediatric care had health problems regardless of the site of care. Many women also reported substantial barriers to comprehensive health care. Most women reported acceptance of a pediatric role in screening and referral. Given the range and depth of maternal health needs, strategies to connect or reconnect mothers to comprehensive adult primary care from a variety of pediatric settings should be explored.

Implementation of Fetal and Infant Mortality Review (FIMR): experience from the national Healthy Start program.

OBJECTIVES: The implementation of the Fetal and Infant Mortality Review (FIMR) process was examined as part of the evaluation of the national Healthy Start program, a federal program designed to reduce infant mortality in several communities. The implementation of the FIMR process over the 5-year funding period is described in terms of productivity, barriers and facilitators to implementation, and project expenditures. METHODS: Data were derived from grant continuation applications and personal interviews with program staff to produce a qualitative description. RESULTS: As of the summer of 1996, 14 of the 15 Healthy Start sites in the national evaluation had successfully implemented the FIMR process. Most sites had developed a two-tiered review process for examination of case data in which a review by health and social services professionals was followed by community review. In the period 1993 to 1995, the percentage of fetal and infant deaths reviewed had a median of 34% with a range of 4-79% across the sites at a cost of $600 to $3400 per death reviewed. Recommendations were variably implemented. CONCLUSIONS: The FIMR process provides an important opportunity to contribute to the knowledge base regarding infant mortality in these communities. The process, however, has important logistical requirements and may require substantial financial resources that may affect implementation of confidential inquiries into infant mortality and other health problems.

Vitamin D replacement in Asians with diabetes may increase insulin resistance.

We report three cases of vitamin D replacement in British Asians with vitamin D deficiency and non-insulin-dependent diabetes mellitus. In all cases, replacement resulted in an increase in insulin resistance and a deterioration of glycaemic control.

Policies towards pregnancy and addiction. Sticks without carrots.

Throughout this century in the United States, tension has existed between those who believe drug abuse is best combatted through the criminal justice system and those who emphasize a medical/public health model of prevention and treatment. In the last decade this debate has centered around the person of the pregnant addict. The former have construed her addiction as willful harm to the fetus punishable on criminal and child abuse grounds. The latter have countered that pregnancy is a moment of increased motivation for treatment and focused on expansion and improvement of treatment options. Both managed care and welfare reform have exacerbated conditions between these opposing policy approaches. The addicted woman is increasingly caught between policies that punish her drug use without options for overcoming addiction.

National survey of the states: policies and practices regarding drug-using pregnant women.

OBJECTIVES: This study assessed the impact of national policy shifts on state policies and practices regarding substance-using mothers. METHODS: A 1995 telephone survey of substance abuse and child protective services directors in all 50 states and the District of Columbia was compared with a similar 1992 survey. RESULTS: There have been significant increases in state interventions for drug-using pregnant women (e.g., criminal prosecution, toxicology testing of women and neonates). Federal resources for treatment and oversight are being replaced by state control of reduced funds for treatment. CONCLUSIONS: The earlier policy of expanding treatment for addicted women is being replaced by reduction of services and increased state intervention.

War experiences and distress symptoms of Bosnian children.

OBJECTIVE: The war in Bosnia has had a tremendous impact on civilians. Little is known about the impact of modern warfare on children. This survey documents the nature and frequency of war-related experiences among Bosnian children and describes their manifestations of selected psychological sequelae. METHODS: A cross-sectional survey of 364 internally displaced 6- to 12-year-old children and their parents living in central Bosnian collectives was conducted during the war. Parents were surveyed for their children's war experiences; the children were surveyed for war-related distress symptoms. RESULTS: The children were exposed to virtually all of the surveyed war-related experiences. The majority had faced separations from family, bereavement, close contact with war and combat, and extreme deprivation. The prevalence and severity of experiences were not significantly related to a child's gender, wealth, or age, but were related to their region of residence, with children from the region of Sarajevo having the highest prevalence of experiences. Almost 94% of the children met Diagnostic and Statistical Manual of Mental Disorders, 4th ed, criteria for posttraumatic stress disorder. Significant life activity affecting sadness and anxiety were reported by 90.6% and 95.5% of the children, respectively. High levels of other symptoms surveyed were also found. Children with greater symptoms had witnessed the death, injury, or torture of a member of their nuclear family, were older, and came from a large city. CONCLUSIONS: The war-related experiences of the children studied were both varied and severe, and were associated with a variety of psychological sequelae. This experience underscores the vulnerability of civilians in areas of conflict and the need to address the effects of war on the mental health of children.

Fertility therapy and the risk of very low birth weight.

OBJECTIVE: To test the hypothesis of an association between maternal infertility therapy and the risk of very low birth weight (VLBW), defined as birth weight less than 1500 g, independent of the risk of multiple births, and to estimate the contribution of infertility therapy to the national incidence of VLBW. METHODS: The National Maternal and Infant Health Survey conducted in 1988 was used to develop statistics describing outcomes among this birth cohort and to construct logistic regression models evaluating fertility therapy as an independent risk factor for VLBW. RESULTS: An estimated 10.1% of live births and 18.2% of VLBW births nationally were associated with either maternal subfertility or infertility therapy (6.8% and 11.4%, respectively). The risk of VLBW among women concerned with subfertility (i.e., receiving diagnostic testing or advice on timing intercourse) was 1.4 (95% confidence interval [CI] 1.1, 1.9), whereas that for women undergoing therapeutic interventions (ie, ovarian stimulation, surgery, in vitro fertilization, or artificial insemination) was 2.6 (95% CI 2.1, 3.2). Accounting for effects of multiple gestation, maternal age, and a history of miscarriage, the odds ratios for the concerned and therapy groups were 1.5 (95% CI 1.1, 1.9) and 2.0 (95% CI 1.5, 2.5), respectively. Black women were less likely to use fertility therapy but more likely to experience a therapy-related VLBW. CONCLUSION: Fertility therapy is associated with an important portion of all VLBW and with an elevated risk of VLBW, related only in part to an increased risk of multiple gestations. Women expressing concern about subfertility but not receiving therapy are also at increased risk of VLBW, suggesting that a history of infertility may mediate part of the risk associated with fertility therapy.

Home uterine activity monitoring in the prevention of very low birth weight.

OBJECTIVES: Despite controversy regarding the efficacy of home uterine activity monitoring (HUAM), it is currently licensed for detection of preterm labor in women with previous preterm deliveries. In practice, however, it is being more widely utilized in an effort to prevent preterm delivery. This study seeks to determine which group of mothers delivering very low birth weight (VLBW) infants would have qualified for HUAM given three different sets of criteria and in which women it could have been used to help prolong gestation. METHODS: The authors reviewed the medical records of mothers of VLBW infants born in five U.S. locations (N = 1440), retrospectively applying three sets of eligibility criteria for HUAM use: (a) the current FDA licensing criterion for use of HUAM, a previous preterm birth; (b) indication for HUAM commonly cited in published reports; (c) a broad set of criteria based on the presence of any reproductive or medical conditions that might predispose to premature delivery. The authors then analyzed the conditions precipitating delivery for each group to determine whether delivery might have been prevented with HUAM and tocolytic therapy. RESULTS: Only 4.4% of the total group of women delivering VLBW infants would have been eligible for HUAM under the FDA criterion and might potentially have benefited from this technology. If extremely broad criteria had been applied to identify those eligible for monitoring, under which almost 80% of all women who delivered VLBW infants would have been monitored, only 20.3% of the total group would have been found eligible and would potentially have benefited. If such broad criteria were applied to all pregnant women, a sizable proportion of pregnancies would be monitored at great expense with small potential clinical benefit. CONCLUSIONS: Because VLBW births are usually precipitated by conditions that are unlikely to benefit from HUAM, this technology will have little impact on reducing VLBW and neonatal mortality rates. More comprehensive preventive strategies should be sought.

Maternal and infant health: effects of moderate reductions in postpartum length of stay.

BACKGROUND: The Newborns' and Mothers' Health Protection Act of 1996 prohibits payers from restricting "benefits for any hospital length of stay in connection with childbirth for the mother or newborn child, following a normal vaginal delivery, to less than 48 hours." The law recognizes the basic right of women and physicians to make decisions about aptness of discharge timing. OBJECTIVE: To provide data as a basis for decisions about aptness of discharge timing by studying the effect of voluntary, moderate reductions in length of postpartum hospital stay on an array of maternal and infant health outcomes. DESIGN: A prospective cohort study. Patients were surveyed by telephone at 3 and 8 weeks postpartum. SETTING: A teaching hospital where 38% of the patients are in a managed care health plan with a noncompulsory reduced stay program offering enhanced prepartum and postpartum services, including home visits. PATIENTS: Consecutive mothers discharged after vaginal delivery during a 3-month period. MAIN OUTCOME MEASURES: The outcomes were health services use within 21 days, breast-feeding, depression, sense of competence, and satisfaction with care. Multivariate analyses adjusted for sociodemographic factors, payer status, services, and social support. RESULTS: Of 1364 eligible patients, 1200 (88%) were surveyed at 3 weeks; of these 1200, 1015 (85%) were resurveyed at 8 weeks. The mean length of stay was 41.9 hours (SD, 12.2 hours). Of patients going home in 30 hours or less, 60.8% belonged to a managed care health plan. The length of stay was not related to the outcomes, except that women hospitalized shorter than 48 hours had more emergency department visits than those staying 40 to 48 hours (adjusted odds ratio, 5.78; 95% confidence interval, 1.19-28.05). CONCLUSIONS: When adequate postpartum outpatient care is accessible, a moderately shorter length of postpartum stay after an uncomplicated vaginal delivery had no adverse effect on an array of outcomes. Researchers and policy makers should seek to better define the content of postpartum services necessary for achieving optimal outcomes for women and newborns; funding should be available to provide such services, regardless of the setting in which they are provided.