Joint meeting on the impact of international migration on third world development, 5-7 June 1984, Geneva,Switzerland. Report of general co-ordinator

This is the report of the general coordinator of a joint meeting on the impact of international migration on third world development, held in Geneva, Switzerland, in 1984. Annotated summaries of the research reports prepared by participants and representatives are presented, and the coordinator's revised research proposal is outlined. (summary in FRE, SPA)     

Geographic variation in surgical treatment for work-related carpal tunnel syndrome: does improved return to work matter?

Medical treatment of compensated work-related conditions has two objectives--improve injured workers' health status and allow safe and sustained return to work (RTW). Theoretically, the choice of treatment method should be based primarily on these objectives. Surgical treatment of work-related carpal tunnel syndrome (CTS) provides an opportunity to evaluate whether this occurs. The traditional method of open release has been complemented by an endoscopic procedure, particularly useful in work-related cases due to the anticipated benefit of earlier RTW. The objective of this study was to investigate the differences in surgical treatment for work-related CTS across eight US workers' compensation (WC) jurisdictions, and the factors associated with these differences. From all WC claims reported to a single insurer during the 1995-1999 period, we identified individuals with a one or two surgical procedures for work-related CTS. Among selected individuals (n=4,421), about 20% were treated using the endoscopic procedure; this percentage had a ten-fold variation across the eight jurisdictions. However, utilization of endoscopic release did not increase during the study period, despite reports of better RTW outcomes. The highly jurisdictional nature of the US WC system, with significant differences in reimbursement levels for endoscopic procedures, and geographical differences in medical training were among the potential contributors to the observed variation in utilization.     

Ergonomic recommendations and their impact on child care workers' health

The purpose of this study was to determine the impact ergonomics has had on the occurrence of musculoskeletal symptoms and injuries among child care workers in Wisconsin using a Classroom and Work Methods Survey developed for this investigation. Information on perceived need for and knowledge of ergonomic interventions, the extent to which ergonomic interventions had been introduced to child care settings, and barriers to implementation of ergonomic recommendations was gathered. Two hundred and fifty-eight respondents completed the survey. The majority of respondents was aware of most (18 of 20) of the recommended ergonomic interventions for child care centers and did not perceive a need to make ergonomic changes. Although the majority of respondents had implemented 15 out of the 20 recommendations, they were currently experiencing musculoskeletal pain while performing their jobs. The results of this study highlight the need for further analysis of specific child care tasks and identification of more effective methods to reduce the risk for musculoskeletal pain and injuries.     

The effect of aging and tennis playing on coincidence-timing accuracy

This study examined the effect of tennis playing on the coincidence timing (CT) of older adults. Young, younger-old and older-old (20-30, 60-69, and 70-79 years old, respectively) tennis players and nonplayers were asked to synchronize a simple response (pressing a button) with the arrival of a moving stimulus at a target. Results showed that the older tennis players responded with a slight bias similar to that of the young players. Two experiments were conducted to determine whether the elimination of age effects through tennis playing was a result of maintaining basic perceptuomotor and perceptual processes or of some possible compensation strategy. The results revealed that the age-related increase in the visuomotor delay was significantly correlated with CT performance in older nonplayers but not in older tennis players. These results suggest that playing tennis is beneficial to older adults, insofar as they remained as accurate as younger ones despite less efficient perceptuomotor processes. This supports the compensation hypothesis.     

The effects of strength training on memory in older adults

The authors examined whether resistance training has an effect on working memory span. Participants included 210 community-residing older adults with at least one disability from the Strong for Life program, a randomized controlled trial that examined the effects of home-based resistance exercise. Memory was assessed with the WAIS backward digit span at baseline and 3 and 6 months into the intervention. Although there were no differences between the experimental treatment and control groups in average levels of memory change, within the treatment group change in resistance level during the intervention was a significant predictor of memory change, controlling for age, education, sex, and disability level. The results suggest that strength training can benefit memory among older adults, especially when using higher resistance levels.     

Expression and ambivalence over expression of negative emotion: cross-sectional associations with psychosocial factors and health-related quality of life in postmenopausal women

Inhibition of emotional expression has been associated with the incidence and progression of breast cancer and other chronic illnesses. The important health-related factor, however, may be ambivalence about the expression of emotions rather than repression itself. This cross-sectional analysis of baseline data from 159,557 participants in the Women's Health Initiative examined the influence of expression of negative emotion and ambivalence about expression of emotion on psychosocial factors and health-related quality of life measured by the Medical Outcomes Study Short-form 36 (SF-36). Overall, observed correlations were modest but in the expected direction; that is, greater ambivalence about negative emotional expression was associated with worse general health and poorer psychosocial risk profile. Ambivalence about expressing negative emotion was more highly correlated with psychosocial factors and health-related quality of life than emotional expression. In general, our analysis supports prior studies suggesting that ambivalence may be more important to consider in studies of health-related outcomes than expression.     

Behavioral health service use and costs among children in foster care

This article compares behavioral health service use and cost for foster care versus nonfoster care children; children before, during, and after foster care placement; and successfully reunified versus nonsuccessfully reunified foster care children. Behavioral health service costs for children in foster care were higher than for children not in foster care. Children in foster care used more services during their foster care placement than before placement and after discharge. Nonsuccessfully reunified children received a significantly larger quantity of services than those successfully reunified.     

Health and the education of children from racial/ethnic minority and immigrant families

Building on a conceptual model of the transition to elementary school, this study explored the role of health in the early cognitive achievement of children from various racial/ethnic minority and immigrant families by applying multilevel modeling to data from a nationally representative sample of American kindergarteners. Whites tended to have the best physical health before transitioning to first grade. Children from immigrant Latino/a and Asian families had the worst physical health but the best mental health. Compared to white children from native families, these health differentials partially explained the lower math achievement and achievement growth of black children (whether from native or immigrant families) in first grade as well as the lower math achievement of children from Latino/a immigrant families and the lower achievement growth of children from Asian immigrant families during this period.