Frederick A Anderson

University of Massachusetts Medical School, Worcester, Massachusetts, United States

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Publications (13)45.24 Total impact

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    ABSTRACT: The Agency for Healthcare Research and Quality (AHRQ) Inpatient Quality Indicator (IQI) #11, abdominal aortic aneurysm (AAA) repair mortality rate, is a measure of hospital quality that is publically reported but has not been externally validated. Because the IQI #11 overall mortality rate includes both intact and ruptured aneurysms and open and endovascular repair, we hypothesized that IQI #11 overall mortality rate does not provide accurate assessment of mortality risk after AAA repair and that AAA mortality cannot be accurately assessed by a single quality measure.
    Journal of vascular surgery. 07/2014;
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    ABSTRACT: We examined the use of pharmacologic agents for the primary prevention of osteoporosis among older women with osteopenia. We found that these individuals were not managed in concordance with the National Osteoporosis Foundation (NOF) guidelines and that self-perceived osteoporosis risk and lower bone density were strongly associated with receipt of treatment. Although osteoporosis medications are used for the primary prevention of osteoporosis among persons with low bone mass (osteopenia), their use may be discordant with clinical practice guidelines. We studied women 55 years and older participating in the Global Longitudinal Study of Osteoporosis in Women (GLOW). Eligible participants had a dual energy x-ray absorptiometry (DXA) test performed at the University of Alabama at Birmingham hospital and had an osteopenia diagnosis based on their DXA test results. Participants' demographics, fracture risk factors, and exposure to osteoporosis medications were determined from the GLOW survey. We examined the proportions of women managed in concordance with the National Osteoporosis Foundation 2008 guidelines, and we assessed factors independently associated with osteoporosis treatment decisions. Women with a prior spine or hip fracture were excluded. Among 597 eligible women from GLOW, the mean age ± standard deviation (SD) was 70 ± 7 years. Among all subjects, 309 (52 %) were treated in concordance with the NOF 2008 guidelines. Greater self-perceived osteoporosis risk and lower bone mineral density were significantly and consistently associated with receipt of osteoporosis treatment, both for those considered appropriate and for those considered inappropriate for treatment based on the NOF guidelines. We found significant discordance between NOF 2008 guidelines and pharmacologic management of women with osteopenia. A person's self-perceived osteoporosis risk and bone mineral density were most strongly associated with receipt of osteoporosis medication use among women with low bone mass.
    Osteoporosis International 08/2013; · 4.04 Impact Factor
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    ABSTRACT: BACKGROUND: Many hospitalized Medical Service patients are at risk for venous thromboembolism in the months after discharge. We conducted a multicenter randomized controlled trial to test whether a hospital staff member's thromboprophylaxis alert to an Attending Physician before discharge will increase the rate of extended out-of-hospital prophylaxis and, in turn, reduce the incidence of symptomatic venous thromboembolism at 90 days. METHODS: From April 2009 to January 2010, we enrolled hospitalized Medical Service patients using the point score system developed by Kucher et al to identify those at high risk for venous thromboembolism who were not ordered to receive thromboprophylaxis after discharge. There were 2513 eligible patients from 18 study sites randomized by computer in a 1:1 ratio to the alert group or the control group. RESULTS: Patients in the alert group were more than twice as likely to receive thromboprophylaxis at discharge as controls (22.0% vs 9.7%, P <.0001). Based on an intention-to-treat analysis, symptomatic venous thromboembolism at 90 days (99.9% follow-up) occurred in 4.5% of patients in the alert group, compared with 4.0% of controls (hazard ratio 1.12; 95% confidence interval, 0.74-1.69). The rate of major bleeding at 30 days in the alert group was similar to that of the control group (1.2% vs 1.2%, hazard ratio 0.94; 95% confidence interval, 0.44-2.01). CONCLUSIONS: Alerting providers to extend thromboprophylaxis after hospital discharge in Medical Service patients increased the rate of prophylaxis but did not decrease the rate of symptomatic venous thromboembolism.
    The American journal of medicine 03/2013; · 5.30 Impact Factor
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    ABSTRACT: We evaluated healthcare utilization associated with treating fracture types in >51,000 women aged ≥55 years. Over the course of 1 year, there were five times more non-hip, non-spine fractures than hip or spine fractures, resulting in twice as many days of hospitalization and rehabilitation/nursing home care for non-hip, non-spine fractures. INTRODUCTION: The purpose of this study is to evaluate medical healthcare utilization associated with treating several types of fractures in women ≥55 years from various geographic regions. METHODS: Information from the Global Longitudinal Study of Osteoporosis in Women (GLOW) was collected via self-administered patient questionnaires at baseline and year 1 (n = 51,491). Self-reported clinically recognized low-trauma fractures at year 1 were classified as incident spine, hip, wrist/hand, arm/shoulder, pelvis, rib, leg, and other fractures. Healthcare utilization data were self-reported and included whether the fracture was treated at a doctor's office/clinic or at a hospital. Patients were asked if they had undergone surgery or been treated at a rehabilitation center or nursing home. RESULTS: During 1-year follow-up, there were 195 spine, 134 hip, and 1,654 non-hip, non-spine fractures. Clinical vertebral fractures resulted in 617 days of hospitalization and 512 days of rehabilitation/nursing home care; hip fractures accounted for 1,306 days of hospitalization and 1,650 days of rehabilitation/nursing home care. Non-hip, non-spine fractures resulted in 3,805 days in hospital and 5,186 days of rehabilitation/nursing home care. CONCLUSIONS: While hip and vertebral fractures are well recognized for their associated increase in health resource utilization, non-hip, non-spine fractures, by virtue of their 5-fold greater number, require significantly more healthcare resources.
    Osteoporosis International 04/2012; · 4.04 Impact Factor
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    ABSTRACT: To determine the proportion of untreated women who reported receiving treatment after incident fracture and to identify factors that predict treatment across an international spectrum of individuals. Prospective observational study. Self-administered questionnaires were mailed at baseline and 1 year. Multinational cohort of noninstitutionalized women recruited from 723 primary physician practices in 10 countries. Sixty thousand three hundred ninety-three postmenopausal women aged 55 and older were recruited with a 2:1 oversampling of women aged 65 and older. Data collected included participant demographics, medical history, fracture occurrence, medications, and risk factors for fracture. Anti-osteoporosis medications (AOMs) included estrogen, selective estrogen receptor modulators, bisphosphonates, calcitonin, parathyroid hormone, and strontium. After the first year of follow-up, 1,075 women reported an incident fracture. Of these, 17% had started AOM, including 15% of those with a single fracture and 35% with multiple fractures. Predictors of treatment included baseline calcium use (P = .01), baseline diagnosis of osteoporosis (P < .001), and fracture type (P < .001). In multivariable analysis, women taking calcium supplements at baseline (odds ratio (OR) = 1.67) and with a baseline diagnosis of osteoporosis (OR = 2.55) were more likely to be taking AOM. Hip fracture (OR = 2.61), spine fracture (OR = 6.61), and multiple fractures (OR = 3.79) were associated with AOM treatment. Age, global region, and use of high-risk medications were not associated with treatment. More than 80% of older women with new fractures were not treated, despite the availability of AOM. Important factors associated with treatment in this international cohort included diagnosis of osteoporosis before the incident fracture, spine fracture, and to a lesser degree, hip fracture.
    Journal of the American Geriatrics Society 02/2012; 60(3):455-61. · 4.22 Impact Factor
  • Claudio Cimminiello, Frederick A Anderson
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    ABSTRACT: Acceptability of a prescribed treatment regimen is crucial to its clinical success, and the route of drug administration can play an important role in determining acceptability. This international survey explored physician and patient perceptions of injectable and oral treatments, and how these perceptions affect acceptability of treatments. Findings are discussed in the context of patient acceptance of treatments for venous thromboembolism (VTE) management. Physicians who are regular prescribers of VTE prophylaxis and a randomly selected patient population were recruited to take part in a questionnaire. Patients had to answer 23 questions and physicians gave their predictions of patients' responses. In total, 568 physicians and 825 patients from 5 countries took part in the survey. More patients considered injectable treatments effective than considered oral treatments effective (87% versus 76%, respectively). This trend was well predicted by the physicians (98% and 61%, respectively). Additionally, 46% of patients would accept an injectable treatment program lasting >2months (rising to 67% for life-threatening diseases), a figure underestimated by physicians (11% and 46%, respectively). Overall, 73% of patients stated they would never miss an injection, where as 54% of physicians expected patients to miss one injection in a month of therapy. Physicians who are regular prescribers of VTE prophylaxis underestimate patients' ability to accept injectable treatments as an alternative to oral therapy. This survey suggests that injectable treatments may be an acceptable, and often preferred, option over oral administration of therapeutic and preventive medicines.
    Thrombosis Research 08/2011; 129(2):139-45. · 3.13 Impact Factor
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    ABSTRACT: To determine if important geographic differences exist in treatment rates for osteoporosis and whether this variation can be explained by regional variation in risk factors. The Global Longitudinal Study of Osteoporosis in Women is an observational study of women ≥55 years sampled from primary care practices in 10 countries. Self-administered questionnaires were used to collect data on patient characteristics, risk factors for fracture, previous fractures, anti-osteoporosis medication, and health status. Among 58,009 women, current anti-osteoporosis medication use was lowest in Northern Europe (16%) and highest in U.S.A. and Australia (32%). Between 48% (U.S.A., Southern Europe) and 68% (Northern Europe) of women aged ≥65 years with a history of spine or hip fracture since age 45 were untreated. Among women with osteoporosis, the percentage of treated cases was lowest in Europe (45-52% versus 62-65% elsewhere). Women with osteopenia and no other risk factors were treated with anti-osteoporosis medication most frequently in U.S.A. (31%) and Canada (31%), and least frequently in Southern Europe (12%), Northern Europe (13%), and Australia (16%). After adjusting for risk factors, U.S. women were threefold as likely to be treated with anti-osteoporosis medication as Northern European women (odds ratio 2.8; 95% confidence interval 2.5-3.1) and 1.5 times as likely to be treated as Southern European women (1.5, 1.4-1.6). Up to half of women reporting previous hip or spine fracture did not receive treatment. The likelihood of being treated for osteoporosis differed between regions, and cannot be explained by variation in risk factors. Many women at risk of fracture do not receive prophylaxis.
    Bone 05/2011; 49(3):493-8. · 4.46 Impact Factor
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    ABSTRACT: To examine several dimensions of health-related quality of life (HRQL) in postmenopausal women who report previous fractures, and to provide perspective by comparing these findings with those in other chronic conditions (diabetes, arthritis, lung disease). Fractures are a major cause of morbidity among older women. Few studies have examined HRQL in women who have had prior fractures and the effect of prior fracture location on HRQL. In this observational study of 57,141 postmenopausal women aged 55 years and older (enrollment from December 2007 to March 2009) from 17 study sites in 10 countries, HRQL was measured using the European Quality of Life 5 Dimensions Index (EQ-5D) and the health status, physical function, and vitality questions of the Medical Outcomes Study 36-Item Short Form Health Survey (SF-36). Reductions in EQ-5D health-utility scores and SF-36-measured health status, physical function, and vitality were seen in association with 9 of 10 fracture locations. Spine, hip, and upper leg fractures resulted in the greatest reductions in quality of life (EQ-5D scores, 0.62, 0.64, and 0.61, respectively, vs 0.79 without prior fracture). Women with fractures at any of these 3 locations, as well as women with a history of multiple fractures (EQ-5D scores, 0.74 for 1 prior fracture, 0.68 for 2, and 0.58 for >/=3), had reductions in HRQL that were similar to or worse than those in women with other chronic diseases (0.67 for diabetes, 0.69 for arthritis, and 0.71 for lung disease). Previous fractures at a variety of bone locations, particularly spine, hip, and upper leg, or involving more than 1 location are associated with significant reductions in quality of life.
    Mayo Clinic Proceedings 09/2010; 85(9):806-13. · 5.79 Impact Factor
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    ABSTRACT: Limited data are available regarding the risk for venous thromboembolism (VTE) and VTE prophylaxis use in hospitalised medically ill patients. We analysed data from the global ENDORSE survey to evaluate VTE risk and prophylaxis use in this population according to diagnosis, baseline characteristics, and country. Data on patient characteristics, VTE risk, and prophylaxis use were abstracted from hospital charts. VTE risk and prophylaxis use were evaluated according to the 2004 American College of Chest Physicians (ACCP) guidelines. Multivariable analysis was performed to identify factors associated with use of ACCP-recommended prophylaxis. Data were evaluated for 37,356 hospitalised medical patients across 32 countries. VTE risk varied according to medical diagnosis, from 31.2% of patients with gastrointestinal/hepatobiliary diseases to 100% of patients with acute heart failure, active non-infectious respiratory disease, or pulmonary infection (global rate, 41.5%). Among those at risk for VTE, ACCP-recommended prophylaxis was used in 24.4% haemorrhagic stroke patients and 40-45% of cardiopulmonary disease patients (global rate, 39.5%). Large differences in prophylaxis use were observed among countries. Markers of disease severity, including central venous catheters, mechanical ventilation, and admission to intensive care units, were strongly associated with use of ACCP-recommended prophylaxis. In conclusion, VTE risk varies according to medical diagnosis. Less than 40% of at-risk hospitalised medical patients receive ACCP-recommended prophylaxis. Prophylaxis use appears to be associated with disease severity rather than medical diagnosis. These data support the necessity to improve implementation of available guidelines for evaluating VTE risk and providing prophylaxis to hospitalised medical patients.
    Thrombosis and Haemostasis 02/2010; 103(4):736-48. · 5.76 Impact Factor
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    ABSTRACT: The Global Longitudinal study of Osteoporosis in Women (GLOW) is a prospective cohort study involving 723 physicians and 60,393 women subjects >or=55 years. The data will provide insights into the management of fracture risk in older women over 5 years, patient experience with prevention and treatment, and distribution of risk among older women on an international basis. Data from cohort studies describing the distribution of osteoporosis-related fractures and risk factors are not directly comparable and do not compare regional differences in patterns of patient management and fracture outcomes. The GLOW is a prospective, multinational, observational cohort study. Practices typical of each region were identified through primary care networks organized for administrative, research, or educational purposes. Noninstitutionalized patients visiting each practice within the previous 2 years were eligible. Self-administered questionnaires were mailed, with 2:1 oversampling of women >or=65 years. Follow-up questionnaires will be sent at 12-month intervals for 5 years. A total of 723 physicians at 17 sites in ten countries agreed to participate. Baseline surveys were mailed (October 2006 to February 2008) to 140,416 subjects. After the exclusion of 3,265 women who were ineligible or had died, 60,393 agreed to participate. GLOW will provide contemporary information on patterns of management of fracture risk in older women over a 5-year period. The collection of data in a similar manner in ten countries will permit comparisons of patient experience with prevention and treatment and provide insights into the distribution of risk among older women on an international basis.
    Osteoporosis International 07/2009; 20(7):1107-16. · 4.04 Impact Factor
  • Bone 01/2009; 44. · 4.46 Impact Factor
  • AT Cohen, VF Tapson, FA Anderson
    Lancet. 01/2008; 371(9628):1912-1913.
  • Revue De Medecine Interne - REV MED INTERNE. 01/2008; 29.

Publication Stats

122 Citations
45.24 Total Impact Points

Institutions

  • 2008–2014
    • University of Massachusetts Medical School
      • • Center for Outcomes Research
      • • Department of Surgery
      Worcester, Massachusetts, United States
  • 2010
    • Hôpital Lariboisière - Fernand-Widal (Hôpitaux Universitaires Sant-Louis, Lariboisière, Fernand-Widal)
      Lutetia Parisorum, Île-de-France, France