919 research outputs found

    BLS Publications, 1886-1971, Bulletin 1749

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    The catalog contain listings for BLS publications from 1886-1971. Numerical listings for BLS Bulletins and Reports as well as subject indexes for these and other BLS publications are included

    BLS Publications, 1978-98, Report 925

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    The catalog contain listings for BLS publications from 1978-98. Numerical listings for BLS Bulletins and Reports as well as subject indexes for these and other BLS publications are included

    The dynamic analysis of continuous-time life-cycle savings growth models

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    Working with the framework of a continuous-time overlapping-generations model, this paper examines equilibrium growth paths (consistent with perfect foresight). In particular, we develop a methodology for characterizing the adjustment paths converging to new stationary states following exogenous shocks. The solution technique yields sequences of derivatives approximating the true dynamic paths and bounds for the errors of approximation. In practice, aggregating behavior over discrete-time intervals can save a great deal of effort -- considerably enhancing the set of models feasible for analysis; our error bounds enable us to aggregate without compromising our results to an unknown degree.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/26597/1/0000138.pd

    Refractive ocular conditions and reasons for spectacles renewal in a resource-limited economy

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    <p>Abstract</p> <p>Background</p> <p>Although a leading cause of visual impairment and a treatable cause of blindness globally, the pattern of refractive errors in many populations is unknown. This study determined the pattern of refractive ocular conditions, reasons for spectacles renewal and the effect of correction on refractive errors in a resource-limited community.</p> <p>Methods</p> <p>A retrospective review of case records of 1,413 consecutive patients seen in a private optometry practice, Nigeria between January 2006 and July 2007.</p> <p>Results</p> <p>A total number of 1,216 (86.1%) patients comprising of (486, 40%) males and (730, 60%) females with a mean age of 41.02 years SD 14.19 were analyzed. The age distribution peaked at peri-adolescent and the middle age years. The main ocular complaints were spectacles loss and discomfort (412, 33.9%), blurred near vision (399, 32.8%) and asthenopia (255, 20.9%). The mean duration of ocular symptoms before consultation was 2.05 years SD 1.92. The most common refractive errors include presbyopia (431, 35.3%), hyperopic astigmatism (240, 19.7%) and presbyopia with hyperopia (276, 22.7%). Only (59, 4.9%) had myopia. Following correction, there were reductions in magnitudes of the blind (VA<3/60) and visually impaired (VA<6/18-3/60) patients by (18, 58.1%) and (89, 81.7%) respectively. The main reasons for renewal of spectacles were broken lenses/frame/scratched lenses/lenses' falling off (47, 63.4%).</p> <p>Conclusions</p> <p>Adequate correction of refractive errors reduces visual impairment and avoidable blindness and to achieve optimal control of refractive errors in the community, services should be targeted at individuals in the peri-adolescent and the middle age years.</p

    BMI, Physical Activity, and Health Care Utilization/Costs among Medicare Retirees

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    Objective : To examine the influence of physical activity (PA) and BMI on health care utilization and costs among Medicare retirees. Research Methods and Procedures : This cross‐sectional study was based on 42, 520 Medicare retirees in a U.S.‐wide manufacturing corporation who participated in indemnity/perferred provider and one health risk appraisal during the years 2001 and 2002. Participants were assigned into one of the three weight groups: normal weight, overweight, and obese. PA behavior was classified into three levels: sedentary (0 time/wk), moderately active (1 to 3 times/wk), and very active (4+ times/wk). Results : Generalized linear models revealed that the moderately active retirees had 1456,1456, 1731, and 1177lowertotalhealthcarechargesthantheirsedentarycounterpartsinthenormal‐weight,overweight,andobesegroups,respectively(p<0.01).Theveryactiveretireeshad1177 lower total health care charges than their sedentary counterparts in the normal‐weight, overweight, and obese groups, respectively ( p < 0.01). The very active retirees had 1823, 581,and581, and 1379 lower costs than the moderately active retirees. Health care utilization and specific costs showed similar trends with PA levels for all BMI groups. The total health care charges were lower with higher PA level for all age groups ( p < 0.01). Discussion : Regular PA has strong dose‐response effects on both health care utilization and costs for overweight/obese as well as normal‐weight people. Promoting active lifestyle in this Medicare population, especially overweight and obese groups, could potentially improve their well‐being and save a substantial amount of health care expenditures. Because those Medicare retirees are hard to reach in general, more creative approaches should be launched to address their needs and interests as well as help reduce the usage of health care system.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/93683/1/oby.2005.175.pd
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