Development of a carpal tunnel syndrome screening method using structured interviews and vibrotactile testing

Carpal tunnel syndrome (CTS) is a debilitating and expensive health problem. An inexpensive screening method that would differentiate between people who do not have CTS and those that may have CTS would be useful. The screening methodology investigated here had two phases: a structured interview and provocative vibrotactile testing (VT). The control group (n = 36) was composed of asymptomatic college students and faculty, the case group was composed of patients currently visiting an occupational medicine clinic for symptoms consistent with CTS. The case group was subdivided into positive and negative for nerve conduction latency, NCL+ (n = 21) and NCL- (n = 13), respectively. Using a scored, structured interview, 33 of the controls and none of the symptomatic cases were identified as non-CTS. The results from the provocative flexion VT indicated that if the difference between the age corrected baseline and the threshold at 15 minutes is 15 microm or more, the subject was likely to be NCL+ (odds ratio 12.6, 95% CI 3.8 to 41.8). Further research may improve this screening methodology to not only determine whether or not a person has CTS, but also to determine the level of median nerve impingement or damage.     

Bootstrap Determination of the Co‐Integration Rank in Vector Autoregressive Models

This paper discusses a consistent bootstrap implementation of the likelihood ratio (LR) co‐integration rank test and associated sequential rank determination procedure of Johansen (1996). The bootstrap samples are constructed using the restricted parameter estimates of the underlying vector autoregressive (VAR) model that obtain under the reduced rank null hypothesis. A full asymptotic theory is provided that shows that, unlike the bootstrap procedure in Swensen (2006) where a combination of unrestricted and restricted estimates from the VAR model is used, the resulting bootstrap data are I(1) and satisfy the null co‐integration rank, regardless of the true rank. This ensures that the bootstrap LR test is asymptotically correctly sized and that the probability that the bootstrap sequential procedure selects a rank smaller than the true rank converges to zero. Monte Carlo evidence suggests that our bootstrap procedures work very well in practice.     

The best-laid schemes: An analysis of discrepancies between migration intentions and behavior

A longitudinal survey approach is used in a largely rural area in the Philippines to examine consistency between migration intentions and subsequent migration behavior. Inconsistencies in movement behavior, the timing of a move, and the destination are analyzed. Discrepancies between intentions and behavior are explained in terms of unanticipated constraints and facilitators as well as changes in the conditions that precipitated the migration intention in the first place. Intended international movers who did not actually move in a 2-1/2 year period were thwarted mainly by legal hurdles that could not be overcome. Intended internal migrants who did not actually move remained in their origin area primarily because of changes in job opportunities or family relationships. Methodological and theoretical implications of the findings are discussed.The best laid schemes o' Mice an' Men Gang aft agley, An' la'e us nought but grief an' pain, For promis'd joy! we must bear in mind the distinction between direct and facilitating factors involved in migration processes . migration analysis should consider some factors that facilitate or impede migration rather than determine migration directly (Goldscheider, 1971:38).This article was originally presented at the annual meetings of the Population Association of American in Minneapolis, Minnesota, May 2–5, 1984. The authors wish to thank Lynna Sycip for her assistance in the preparation of the tabulations for this article. In addition to the authors, the co-investigators for this project are James T. Fawcett, East-West Population Institute and Ricardo G. Abad, Institute of Philippine Culture, Ateneo de Manila University. Research for this article has been supported by NIH Grant No. R01-HD13115, the Population Center Foundation, Manila, Philippines, and the East-West Population Institute.     

Correlates of gay and lesbian couples' relationship satisfaction and relationship dissolution

A sample of committed gay and lesbian cohabiting couples engaged in two conversations after being apart for at least 8 hours: (a) an events of the day conversation and (b) a conflict resolution conversation. Physiological data were collected during the conversations and a videotape record was made. Couples viewed the videotapes and rated their affect during the interaction. The video records were coded with a system that categorized specific affects displayed. Models derived from physiology, from the perception of interaction, and from specific affective behavior were related to relationship satisfaction, and to the prediction of relationship dissolution over a 12-year period. Results supported previous findings that satisfaction and stability in gay and lesbian relationships are related to similar emotional qualities as in heterosexual relationships.     

Things visible and invisible: the Leather Archives and Museum

This paper explores the reasons underlying the relative absence of research on the leather/levi community in gay and lesbian studies and summarizes the history and special collections of Chicago's Leather Archives and Museum.     

The effect of expansions in medicaid income eligibility on abortion

In this paper we examine the effect of expansions in Medicaid income eligibility on abortion, using individual-level data from South Carolina, Tennessee, and Virginia. The results suggest that for unmarried nonblack women with less than a high school degree, expansions of income eligibility lowered the probability of abortion by two to five percentage points. Most of the impact of the Medicaid expansions on abortion occurred in the first round of expansions from approximately 45% of the federal poverty level to 100%. For black unmarried women with less than a high school degree, we generally find no effect of expansions in Medicaid income eligibility on abortion.     

The human population carrying capacity of the chesapeake bay watershed: A preliminary analysis

Estimating human population carrying capacity for subglobal areas is problematic due to interregional transfers of energy, resources, pollution and waste. However, recent research on Chesapeake Bay sediment has permitted determination of time of onset of major episodes of Bay degradation, which may be used with census data to derive preliminary estimates of the watershed's carrying capacity.Chesapeake Bay, the United States' largest estuary, is experiencing increasing degradation despite a decade of studies and significant remedial activity. Since 1985, phosphorus emissions declined 18%, due mainly to a ban on phosphate detergent, but nitrogen increased at least 2%. Degrading influences, related to increasing fossil-fuel consumption and relentless population growth, include (1) overharvesting of shellfish and fish species, (2) nitrogen emissions from sewage treatment plants, agriculture, fossil-fueled power plants and motor vehicles, (3) phosphorus emissions from sewage and agriculture, (4) debris, sewage, fuel spills and exhaust from 400,000 registered watercraft, (5) storm-water runoff, (6) sedimentation from land-use changes, (7) industrial discharges, (8) construction of dams and other barriers to anadromous fish migration, and (9) disposal of dredged material.Oyster harvests have declined over 95% in Virginia since the 1950s. Submerged aquatic vegetation (SAV), essential to fish and bottom-dwelling invertebrates, is estimated to cover only 10% of its pre-1950 distribution. Where remediation efforts have resulted in recolonization of SAV, species diversity is reduced 50–90%. Anoxic conditions are persistent in the Bay's deeper waters.New sediment data allow precise determination of time of onset of degration by recognizing changes in ratio of benthic to planktonic diatoms. These data, coupled with analyses of living resource populations, indicate that the most significant episode of Bay degradation commenced in the 1950s, and suggest that the human population carrying capacity for the watershed does not exceed 8 million without substantial changes in energy consumption and lifestyle. The watershed's present population of 16 million is projected to increase at least 20% by 2020. Furthermore, registration of motor vehicles may increase by one-third over the same interval. Goals of 40% reduction by 2000 of nitrogen and phosphorus emissions into the Bay set by the Chesapeake Bay Commission are unattainable without permanent changes in behavior affecting every facet of life in the watershed. The extent to which remediation efforts are successful in the Bay's watershed will help define much of the structure and nature of U.S. society in the twenty-first century.     

The effect of pregnancy intention on child development

In this paper, we use data from the National Longitudinal Survey of Youth to investigate the empirical link between unintended pregnancy and child health and development. An important contribution of our study is the use of information on siblings to control for unmeasured factors that may confound estimates of the effect of pregnancy intentions on infant and child outcomes. Results from our study indicate that unwanted pregnancy is associated with prenatal and postpartum maternal behaviors that adversely affect infant and child health, but that unwanted pregnancy has little association with birth weight and child cognitive outcomes. Estimates of the association between unwanted pregnancy and maternal behaviors were greatly reduced after controls for unmeasured family background were included in the model. Our results also indicate that there are no significant differences in maternal behaviors or child outcomes between mistimed and wanted pregnancies.     

Family Demography,Social Theory,and Investment in Social Capital

The analytic models used by family demographers would be strengthened by the concept of social capital, placed in the context of social exchange theory. Using that concept to designate resources that emerge from social ties, the authors advance five propositions: 1) social capital is a multidimensional attribute of an individual; 2) the dimensions of social capital are the number of relationships a person has, their quality (strength), and the resources available through those relationships; 3) group membership and interaction facilitate the development of social capital; 4) the structural properties of groups influence the development of social capital; and 5) the acquisition and maintenance of social capital is a major motivator of human behavior. The formation of sexual partnerships, the birth and rearing of children, and both intragenerational and intergenerational transfers constitute major forms of investment in social capital in virtually all societies.